Options Reference

Dygraphs tries to do a good job of displaying your data without any further configuration. But inevitably, you're going to want to tinker. Dygraphs provides a rich set of options for configuring its display and behavior.

Usage

You specify options in the third parameter to the dygraphs constructor:

g = new Dygraph(div,
                data,
                {
                  option1: value1,
                  option2: value2,
                  ...
                });

After you've created a Dygraph, you can change an option by calling the updateOptions method:

g.updateOptions({
                  new_option1: value1,
                  new_option2: value2
                });

Some options can be set on a per-axis and per-series basis. See the docs on per-axis and per-series options to learn how to do this. The options which may be set in this way are marked as such on this page.

And, without further ado, here's the complete list of options:

Annotations

annotationClickHandler

If provided, this function is called whenever the user clicks on an annotation.

Type: function(annotation, point, dygraph, event)
annotation: the annotation left
point: the point associated with the annotation
dygraph: the reference graph
event: the mouse event
Default: null

Gallery Samples: annotations
Other Examples: annotation

annotationDblClickHandler

If provided, this function is called whenever the user double-clicks on an annotation.

Type: function(annotation, point, dygraph, event)
annotation: the annotation left
point: the point associated with the annotation
dygraph: the reference graph
event: the mouse event
Default: null

Gallery Samples: annotations
Other Examples: annotation

annotationMouseOutHandler

If provided, this function is called whenever the user mouses out of an annotation.

Type: function(annotation, point, dygraph, event)
annotation: the annotation left
point: the point associated with the annotation
dygraph: the reference graph
event: the mouse event
Default: null

Gallery Samples: annotations
Other Examples: annotation

annotationMouseOverHandler

If provided, this function is called whenever the user mouses over an annotation.

Type: function(annotation, point, dygraph, event)
Default: null

Gallery Samples: annotations
Other Examples: annotation

displayAnnotations

Only applies when Dygraphs is used as a GViz chart. Causes string columns following a data series to be interpreted as annotations on points in that series. This is the same format used by Google's AnnotatedTimeLine chart.

Type: boolean
Default: false

Gallery Samples: annotations-gviz
Other Examples: annotation-gviz

Axis display

axis

Set to either an object ({}) filled with options for this axis or to the name of an existing data series with its own axis to re-use that axis. See tests for usage.

Type: string or object
Default: (none)

Gallery Samples: two-axes
Other Examples: grid_dot steps two-axes-vr two-axes value-axis-formatters

axisLabelColor

Color for x- and y-axis labels. This is a CSS color string.

Type: string
Default: black

Gallery Samples: NONE
Other Examples: NONE

axisLabelFontSize

Size of the font (in pixels) to use in the axis labels, both x- and y-axis.

Type: integer
Default: 14

Gallery Samples: NONE
Other Examples: NONE

axisLabelFormatter

Function to call to format the tick values that appear along an axis. This is usually set on a per-axis basis.

Type: function(number or Date, granularity, opts, dygraph)
number or date: Either a number (for a numeric axis) or a Date object (for a date axis)
granularity: specifies how fine-grained the axis is. For date axes, this is a reference to the time granularity enumeration, defined in dygraph-tickers.js, e.g. Dygraph.WEEKLY.
opts: a function which provides access to various options on the dygraph, e.g. opts('labelsKMB').
dygraph: the referenced graph
Default: Depends on the data type

Gallery Samples: NONE
Other Examples: value-axis-formatters x-axis-formatter

axisLabelWidth

Width (in pixels) of the containing divs for x- and y-axis labels. For the y-axis, this also controls

Type: integer
Default: 50

Gallery Samples: NONE
Other Examples: NONE

axisLineColor

Color of the x- and y-axis lines. Accepts any value which the HTML canvas strokeStyle attribute understands, e.g. 'black' or 'rgb(0, 100, 255)'.

Type: string
Default: black

Gallery Samples: demo
Other Examples: demo plugins

axisLineWidth

Thickness (in pixels) of the x- and y-axis lines.

Type: float
Default: 0.3

Gallery Samples: NONE
Other Examples: NONE

axisTickSize

The size of the line to display next to each tick mark on x- or y-axes.

Type: number
Default: 3.0

Gallery Samples: NONE
Other Examples: NONE

dateWindow

Initially zoom in on a section of the graph. Is of the form [earliest, latest], where earliest/latest are milliseconds since epoch. If the data for the x-axis is numeric, the values in dateWindow must also be numbers.

Type: Array of two numbers
Default: Full range of the input is shown

Gallery Samples: drawing interaction-api link-interaction synchronize
Other Examples: dateWindow daylight-savings drawing independent-series is-zoomed-ignore-programmatic-zoom link-interaction plotters synchronize zoom

drawAxesAtZero

When set, draw the X axis at the Y=0 position and the Y axis at the X=0 position if those positions are inside the graph's visible area. Otherwise, draw the axes at the bottom or left graph edge as usual.

Type: boolean
Default: false

Gallery Samples: edge-padding linear-regression
Other Examples: NONE

drawXAxis

Whether to draw the x-axis. Setting this to false also prevents x-axis ticks from being drawn and reclaims the space for the chart grid/lines.

Type: boolean
Default: true

Gallery Samples: NONE
Other Examples: range-selector unboxed-spark

drawYAxis

Whether to draw the y-axis. Setting this to false also prevents y-axis ticks from being drawn and reclaims the space for the chart grid/lines.

Type: boolean
Default: true

Gallery Samples: drawing
Other Examples: drawing unboxed-spark

includeZero

Usually, dygraphs will use the range of the data plus some padding to set the range of the y-axis. If this option is set, the y-axis will always include zero, typically as the lowest value. This can be used to avoid exaggerating the variance in the data

Type: boolean
Default: false

Gallery Samples: edge-padding no-range
Other Examples: no-range numeric-gviz plotters small-range-zero steps

independentTicks

Only valid for y and y2, has no effect on x: This option defines whether the y axes should align their ticks or if they should be independent. Possible combinations: 1.) y=true, y2=false (default): y is the primary axis and the y2 ticks are aligned to the the ones of y. (only 1 grid) 2.) y=false, y2=true: y2 is the primary axis and the y ticks are aligned to the the ones of y2. (only 1 grid) 3.) y=true, y2=true: Both axis are independent and have their own ticks. (2 grids) 4.) y=false, y2=false: Invalid configuration causes an error.

Type: boolean
Default: true for y, false for y2

Gallery Samples: NONE
Other Examples: grid_dot two-axes

logscale

When set for a y-axis, the graph shows that axis in log scale. Any values less than or equal to zero are not displayed. Not compatible with showZero, and ignores connectSeparatedPoints. Also, showing log scale with valueRanges that are less than zero will result in an unviewable graph.

Type: boolean
Default: false

Gallery Samples: stock
Other Examples: logscale stock

panEdgeFraction

A value representing the farthest a graph may be panned, in percent of the display. For example, a value of 0.1 means that the graph can only be panned 10% pased the edges of the displayed values. null means no bounds.

Type: float
Default: null

Gallery Samples: NONE
Other Examples: zoom

pixelsPerLabel

Number of pixels to require between each x- and y-label. Larger values will yield a sparser axis with fewer ticks. This is set on a per-axis basis.

Type: integer
Default: 60 (x-axis) or 30 (y-axes)

Gallery Samples: NONE
Other Examples: value-axis-formatters

ticker

This lets you specify an arbitrary function to generate tick marks on an axis. The tick marks are an array of (value, label) pairs. The built-in functions go to great lengths to choose good tick marks so, if you set this option, you'll most likely want to call one of them and modify the result. See dygraph-tickers.js for an extensive discussion. This is set on a per-axis basis.

Type: function(min, max, pixels, opts, dygraph, vals) -> [{v: ..., label: ...}, ...]
min:
max:
pixels:
opts:
dygraph: the reference graph
vals:
Default: Dygraph.dateTicker or Dygraph.numericTicks

Gallery Samples: NONE
Other Examples: grid_dot

valueRange

Explicitly set the vertical range of the graph to [low, high]. This may be set on a per-axis basis to define each y-axis separately. If either limit is unspecified, it will be calculated automatically (e.g. [null, 30] to automatically calculate just the lower bound)

Type: Array of two numbers
Default: Full range of the input is shown

Gallery Samples: drawing dynamic-update edge-padding interaction-api synchronize
Other Examples: drawing dynamic-update grid_dot is-zoomed-ignore-programmatic-zoom no-visibility reverse-y-axis synchronize two-axes-vr zoom

xAxisHeight

Height, in pixels, of the x-axis. If not set explicitly, this is computed based on axisLabelFontSize and axisTickSize.

Type: integer
Default: (null)

Gallery Samples: NONE
Other Examples: range-selector

xAxisLabelWidth

Width, in pixels, of the x-axis labels.

Type: integer
Default: 50

Gallery Samples: NONE
Other Examples: value-axis-formatters x-axis-formatter

xRangePad

Add the specified amount of extra space (in pixels) around the X-axis value range to ensure points at the edges remain visible.

Type: float
Default: 0

Gallery Samples: edge-padding
Other Examples: NONE

yAxisLabelWidth

Width, in pixels, of the y-axis labels. This also affects the amount of space available for a y-axis chart label.

Type: integer
Default: 50

Gallery Samples: two-axes
Other Examples: customLabel customLabelCss3 multi-scale two-axes-vr two-axes value-axis-formatters

yRangePad

If set, add the specified amount of extra space (in pixels) around the Y-axis value range to ensure points at the edges remain visible. If unset, use the traditional Y padding algorithm.

Type: float
Default: null

Gallery Samples: edge-padding
Other Examples: NONE

CSV parsing

customBars

When set, parse each CSV cell as "low;middle;high". Error bars will be drawn for each point between low and high, with the series itself going through middle.

Type: boolean
Default: false

Gallery Samples: range-selector stock temperature-sf-ny
Other Examples: custom-bars missing-data range-selector steps stock temperature-sf-ny zero-series

delimiter

The delimiter to look for when separating fields of a CSV file. Setting this to a tab is not usually necessary, since tab-delimited data is auto-detected.

Type: string
Default: ,

Gallery Samples: NONE
Other Examples: NONE

fractions

When set, attempt to parse each cell in the CSV file as "a/b", where a and b are integers. The ratio will be plotted. This allows computation of Wilson confidence intervals (see below).

Type: boolean
Default: false

Gallery Samples: NONE
Other Examples: fractions linear-regression-fractions

xValueParser

A function which parses x-values (i.e. the dependent series). Must return a number, even when the values are dates. In this case, millis since epoch are used. This is used primarily for parsing CSV data. *=Dygraphs is slightly more accepting in the dates which it will parse. See code for details.

Type: function(str) -> number
Default: parseFloat() or Date.parse()*

Gallery Samples: NONE
Other Examples: NONE

Callbacks

clickCallback

A function to call when the canvas is clicked.

Type: function(e, x, points)
e: The event object for the click
x: The x value that was clicked (for dates, this is milliseconds since epoch)
points: The closest points along that date. See Point properties for details.
Default: null

Gallery Samples: callbacks highlighted-series
Other Examples: callback

drawCallback

When set, this callback gets called every time the dygraph is drawn. This includes the initial draw, after zooming and repeatedly while panning.

Type: function(dygraph, is_initial)
dygraph: The graph being drawn
is_initial: True if this is the initial draw, false for subsequent draws.
Default: null

Gallery Samples: annotations callbacks synchronize
Other Examples: annotation callback is-zoomed-ignore-programmatic-zoom is-zoomed linear-regression-addseries synchronize zoom

highlightCallback

When set, this callback gets called every time a new point is highlighted.

Type: function(event, x, points, row, seriesName)
event: the JavaScript mousemove event
x: the x-coordinate of the highlighted points
points: an array of highlighted points: [ {name: 'series', yval: y-value}, … ]
row: integer index of the highlighted row in the data table, starting from 0
seriesName: name of the highlighted series, only present if highlightSeriesOpts is set.
Default: null

Gallery Samples: callbacks
Other Examples: callback crosshair

pointClickCallback

A function to call when a data point is clicked. and the point that was clicked.

Type: function(e, point)
e: the event object for the click
point: the point that was clicked See Point properties for details
Default: null

Gallery Samples: annotations callbacks
Other Examples: annotation callback

underlayCallback

When set, this callback gets called before the chart is drawn. It details on how to use this.

Type: function(context, area, dygraph)
context: the canvas drawing context on which to draw
area: An object with {x,y,w,h} properties describing the drawing area.
dygraph: the reference graph
Default: null

Gallery Samples: highlighted-region highlighted-weekends interaction linear-regression
Other Examples: highlighted-region interaction linear-regression-fractions linear-regression underlay-callback

unhighlightCallback

When set, this callback gets called every time the user stops highlighting any point by mousing out of the graph.

Type: function(event)
event: the mouse event
Default: null

Gallery Samples: callbacks
Other Examples: callback crosshair

zoomCallback

A function to call when the zoom window is changed (either by zooming in or out).

Type: function(minDate, maxDate, yRanges)
minDate: milliseconds since epoch
maxDate: milliseconds since epoch.
yRanges: is an array of [bottom, top] pairs, one for each y-axis.
Default: null

Gallery Samples: callbacks
Other Examples: callback is-zoomed-ignore-programmatic-zoom zoom

Chart labels

axisLabelWidth

Width (in pixels) of the containing divs for x- and y-axis labels. For the y-axis, this also controls

Type: integer
Default: 50

Gallery Samples: NONE
Other Examples: NONE

title

Text to display above the chart. You can supply any HTML for this value, not just text. If you wish to style it using CSS, use the 'dygraph-label' or 'dygraph-title' classes.

Type: string
Default: null

Gallery Samples: border demo gallery range-selector styled-chart-labels temperature-sf-ny
Other Examples: border demo multi-scale plotters plugins range-selector styled-chart-labels temperature-sf-ny

titleHeight

Height of the chart title, in pixels. This also controls the default font size of the title. If you style the title on your own, this controls how much space is set aside above the chart for the title's div.

Type: integer
Default: 18

Gallery Samples: styled-chart-labels
Other Examples: styled-chart-labels

xLabelHeight

Height of the x-axis label, in pixels. This also controls the default font size of the x-axis label. If you style the label on your own, this controls how much space is set aside below the chart for the x-axis label's div.

Type: integer
Default: 18

Gallery Samples: NONE
Other Examples: NONE

xlabel

Text to display below the chart's x-axis. You can supply any HTML for this value, not just text. If you wish to style it using CSS, use the 'dygraph-label' or 'dygraph-xlabel' classes.

Type: string
Default: null

Gallery Samples: border demo styled-chart-labels
Other Examples: border demo multi-scale plugins styled-chart-labels

y2label

Text to display to the right of the chart's secondary y-axis. This label is only displayed if a secondary y-axis is present. See this test for an example of how to do this. The comments for the 'ylabel' option generally apply here as well. This label gets a 'dygraph-y2label' instead of a 'dygraph-ylabel' class.

Type: string
Default: null

Gallery Samples: two-axes
Other Examples: two-axes-vr two-axes

yLabelWidth

Width of the div which contains the y-axis label. Since the y-axis label appears rotated 90 degrees, this actually affects the height of its div.

Type: integer
Default: 18

Gallery Samples: NONE
Other Examples: NONE

ylabel

Text to display to the left of the chart's y-axis. You can supply any HTML for this value, not just text. If you wish to style it using CSS, use the 'dygraph-label' or 'dygraph-ylabel' classes. The text will be rotated 90 degrees by default, so CSS rules may behave in unintuitive ways. No additional space is set aside for a y-axis label. If you need more space, increase the width of the y-axis tick labels using the yAxisLabelWidth option. If you need a wider div for the y-axis label, either style it that way with CSS (but remember that it's rotated, so width is controlled by the 'height' property) or set the yLabelWidth option.

Type: string
Default: null

Gallery Samples: border demo range-selector styled-chart-labels temperature-sf-ny two-axes
Other Examples: border demo multi-scale plugins range-selector styled-chart-labels temperature-sf-ny two-axes-vr two-axes

Configuration

plugins

Defines per-graph plug-ins. Useful for per-graph customization

Type: Array
Default: []

Gallery Samples: NONE
Other Examples: plugins

Data

file

Sets the data being displayed in the chart. This can only be set when calling updateOptions; it cannot be set from the constructor. For a full description of valid data formats, see the Data Formats page.

Type: string (URL of CSV or CSV), GViz DataTable or 2D Array
Default: (set when constructed)

Gallery Samples: drawing
Other Examples: drawing dygraph-many-points-benchmark

Data Line display

connectSeparatedPoints

Usually, when Dygraphs encounters a missing value in a data series, it interprets this as a gap and draws it as such. If, instead, the missing values represents an x-value for which only a different series has data, then you'll want to connect the dots by setting this to true. To explicitly include a gap with this option set, use a value of NaN.

Type: boolean
Default: false

Gallery Samples: independent-series
Other Examples: connect-separated independent-series missing-data

drawGapEdgePoints

Draw points at the edges of gaps in the data. This improves visibility of small data segments or other data irregularities.

Type: boolean
Default: false

Gallery Samples: NONE
Other Examples: isolated-points

drawHighlightPointCallback

Draw a custom item when a point is highlighted. Default is a small dot matching the series color. This method should constrain drawing to within pointSize pixels from (cx, cy) Also see drawPointCallback

Type: function(g, seriesName, canvasContext, cx, cy, color, pointSize)
g: the reference graph
seriesName: the name of the series
canvasContext: the canvas to draw on
cx: center x coordinate
cy: center y coordinate
color: series color
pointSize: the radius of the image.
idx: the row-index of the point in the data.
Default: null

Gallery Samples: NONE
Other Examples: custom-circles

drawPointCallback

Draw a custom item when drawPoints is enabled. Default is a small dot matching the series color. This method should constrain drawing to within pointSize pixels from (cx, cy). Also see drawHighlightPointCallback

Type: function(g, seriesName, canvasContext, cx, cy, color, pointSize)
g: the reference graph
seriesName: the name of the series
canvasContext: the canvas to draw on
cx: center x coordinate
cy: center y coordinate
color: series color
pointSize: the radius of the image.
idx: the row-index of the point in the data.
Default: null

Gallery Samples: NONE
Other Examples: custom-circles

drawPoints

Draw a small dot at each point, in addition to a line going through the point. This makes the individual data points easier to see, but can increase visual clutter in the chart. The small dot can be replaced with a custom rendering by supplying a drawPointCallback.

Type: boolean
Default: false

Gallery Samples: dynamic-update independent-series interaction linear-regression per-series
Other Examples: custom-circles draw-points dynamic-update independent-series interaction linear-regression-addseries linear-regression-fractions linear-regression per-series

fillGraph

Should the area underneath the graph be filled? This option is not compatible with error bars. This may be set on a per-series basis.

Type: boolean
Default: false

Gallery Samples: two-axes
Other Examples: charting-combinations fillGraph steps two-axes

plotter

A function (or array of functions) which plot each data series on the chart. TODO(danvk): more details! May be set per-series.

Type: array or function
Default: [DygraphCanvasRenderer.Plotters.fillPlotter, DygraphCanvasRenderer.Plotters.errorPlotter, DygraphCanvasRenderer.Plotters.linePlotter]

Gallery Samples: NONE
Other Examples: plotters

pointSize

The size of the dot to draw on each point in pixels (see drawPoints). A dot is always drawn when a point is "isolated", i.e. there is a missing point on either side of it. This also controls the size of those dots.

Type: integer
Default: 1

Gallery Samples: per-series
Other Examples: custom-circles independent-series isolated-points per-series

stackedGraph

If set, stack series on top of one another rather than drawing them independently. The first series specified in the input data will wind up on top of the chart and the last will be on bottom. NaN values are drawn as white areas without a line on top, see stackedGraphNaNFill for details.

Type: boolean
Default: false

Gallery Samples: highlighted-series
Other Examples: series-highlight stacked steps

stackedGraphNaNFill

Controls handling of NaN values inside a stacked graph. NaN values are interpolated/extended for stacking purposes, but the actual point value remains NaN in the legend display. Valid option values are "all" (interpolate internally, repeat leftmost and rightmost value as needed), "inside" (interpolate internally only, use zero outside leftmost and rightmost value), and "none" (treat NaN as zero everywhere).

Type: string
Default: all

Gallery Samples: NONE
Other Examples: NONE

stepPlot

When set, display the graph as a step plot instead of a line plot. This option may either be set for the whole graph or for single series.

Type: boolean
Default: false

Gallery Samples: avoid-min-zero
Other Examples: avoidMinZero charting-combinations steps

strokeBorderColor

Color for the line border used if strokeBorderWidth is set.

Type: string
Default: white

Gallery Samples: NONE
Other Examples: NONE

strokeBorderWidth

Draw a border around graph lines to make crossing lines more easily distinguishable. Useful for graphs with many lines.

Type: float
Default: null

Gallery Samples: highlighted-series
Other Examples: custom-circles series-highlight

strokePattern

A custom pattern array where the even index is a draw and odd is a space in pixels. If null then it draws a solid line. The array should have a even length as any odd lengthed array could be expressed as a smaller even length array. This is used to create dashed lines.

Type: array
Default: null

Gallery Samples: NONE
Other Examples: charting-combinations per-series plotters

strokeWidth

The width of the lines connecting data points. This can be used to increase the contrast or some graphs.

Type: float
Default: 1.0

Gallery Samples: drawing highlighted-series linear-regression per-series styled-chart-labels
Other Examples: custom-circles drawing grid_dot layout-options linear-regression-addseries linear-regression-fractions linear-regression per-series plotters series-highlight styled-chart-labels unboxed-spark

visibility

Which series should initially be visible? Once the Dygraph has been constructed, you can access and modify the visibility of each series using the visibility and setVisibility methods.

Type: Array of booleans
Default: [true, true, ...]

Gallery Samples: color-visibility
Other Examples: color-visibility crosshair no-visibility visibility

Data Series Colors

colorSaturation

If colors is not specified, saturation of the automatically-generated data series colors.

Type: float (0.0 - 1.0)
Default: 1.0

Gallery Samples: NONE
Other Examples: NONE

colorValue

If colors is not specified, value of the data series colors, as in hue/saturation/value. (0.0-1.0, default 0.5)

Type: float (0.0 - 1.0)
Default: 1.0

Gallery Samples: NONE
Other Examples: NONE

colors

List of colors for the data series. These can be of the form "#AABBCC" or "rgb(255,100,200)" or "yellow", etc. If not specified, equally-spaced points around a color wheel are used.

Type: array
Default: (see description)

Gallery Samples: color-cycle color-visibility demo
Other Examples: century-scale color-cycle color-visibility demo plugins reverse-y-axis

fillAlpha

Error bars (or custom bars) for each series are drawn in the same color as the series, but with partial transparency. This sets the transparency. A value of 0.0 means that the error bars will not be drawn, whereas a value of 1.0 means that the error bars will be as dark as the line for the series itself. This can be used to produce chart lines whose thickness varies at each point.

Type: float (0.0 - 1.0)
Default: 0.15

Gallery Samples: NONE
Other Examples: NONE

Debugging

timingName

Set this option to log timing information. The value of the option will be logged along with the timimg, so that you can distinguish multiple dygraphs on the same page.

Type: string
Default: null

Gallery Samples: NONE
Other Examples: dygraph-many-points-benchmark

Deprecated

avoidMinZero

Deprecated, please use yRangePad instead. When set, the heuristic that fixes the Y axis at zero for a data set with the minimum Y value of zero is disabled. This is particularly useful for data sets that contain many zero values, especially for step plots which may otherwise have lines not visible running along the bottom axis.

Type: boolean
Default: false

Gallery Samples: avoid-min-zero edge-padding
Other Examples: avoidMinZero

drawXGrid

Use the per-axis option drawGrid instead. Whether to display vertical gridlines under the chart.

Type: boolean
Default: true

Gallery Samples: demo
Other Examples: demo plotters unboxed-spark

drawYGrid

Use the per-axis option drawGrid instead. Whether to display horizontal gridlines under the chart.

Type: boolean
Default: true

Gallery Samples: drawing
Other Examples: drawing unboxed-spark

pixelsPerXLabel

Prefer axes { x: { pixelsPerLabel } }

Type: integer
Default: (missing)

Gallery Samples: NONE
Other Examples: NONE

pixelsPerYLabel

Prefer axes: { y: { pixelsPerLabel } }

Type: integer
Default: (missing)

Gallery Samples: NONE
Other Examples: spacing

xAxisLabelFormatter

Prefer axes { x: { axisLabelFormatter } }

Type: (missing)
Default: (missing)

Gallery Samples: NONE
Other Examples: NONE

xValueFormatter

Prefer axes: { x: { valueFormatter } }

Type: (missing)
Default: (missing)

Gallery Samples: NONE
Other Examples: NONE

yAxisLabelFormatter

Prefer axes: { y: { axisLabelFormatter } }

Type: (missing)
Default: (missing)

Gallery Samples: NONE
Other Examples: NONE

yValueFormatter

Prefer axes: { y: { valueFormatter } }

Type: (missing)
Default: (missing)

Gallery Samples: NONE
Other Examples: labelsKMB

Error Bars

customBars

When set, parse each CSV cell as "low;middle;high". Error bars will be drawn for each point between low and high, with the series itself going through middle.

Type: boolean
Default: false

Gallery Samples: range-selector stock temperature-sf-ny
Other Examples: custom-bars missing-data range-selector steps stock temperature-sf-ny zero-series

fillAlpha

Error bars (or custom bars) for each series are drawn in the same color as the series, but with partial transparency. This sets the transparency. A value of 0.0 means that the error bars will not be drawn, whereas a value of 1.0 means that the error bars will be as dark as the line for the series itself. This can be used to produce chart lines whose thickness varies at each point.

Type: float (0.0 - 1.0)
Default: 0.15

Gallery Samples: NONE
Other Examples: NONE

fractions

When set, attempt to parse each cell in the CSV file as "a/b", where a and b are integers. The ratio will be plotted. This allows computation of Wilson confidence intervals (see below).

Type: boolean
Default: false

Gallery Samples: NONE
Other Examples: fractions linear-regression-fractions

sigma

When errorBars is set, shade this many standard deviations above/below each point.

Type: float
Default: 2.0

Gallery Samples: NONE
Other Examples: NONE

wilsonInterval

Use in conjunction with the "fractions" option. Instead of plotting +/- N standard deviations, dygraphs will compute a Wilson confidence interval and plot that. This has more reasonable behavior for ratios close to 0 or 1.

Type: boolean
Default: true

Gallery Samples: NONE
Other Examples: NONE

Grid

drawGrid

Whether to display gridlines in the chart. This may be set on a per-axis basis to define the visibility of each axis' grid separately.

Type: boolean
Default: true for x and y, false for y2

Gallery Samples: NONE
Other Examples: grid_dot two-axes

drawXGrid

Use the per-axis option drawGrid instead. Whether to display vertical gridlines under the chart.

Type: boolean
Default: true

Gallery Samples: demo
Other Examples: demo plotters unboxed-spark

drawYGrid

Use the per-axis option drawGrid instead. Whether to display horizontal gridlines under the chart.

Type: boolean
Default: true

Gallery Samples: drawing
Other Examples: drawing unboxed-spark

gridLineColor

The color of the gridlines. This may be set on a per-axis basis to define each axis' grid separately.

Type: red, blue
Default: rgb(128,128,128)

Gallery Samples: drawing edge-padding
Other Examples: drawing grid_dot

gridLineWidth

Thickness (in pixels) of the gridlines drawn under the chart. The vertical/horizontal gridlines can be turned off entirely by using the drawXGrid and drawYGrid options. This may be set on a per-axis basis to define each axis' grid separately.

Type: float
Default: 0.3

Gallery Samples: NONE
Other Examples: grid_dot

independentTicks

Only valid for y and y2, has no effect on x: This option defines whether the y axes should align their ticks or if they should be independent. Possible combinations: 1.) y=true, y2=false (default): y is the primary axis and the y2 ticks are aligned to the the ones of y. (only 1 grid) 2.) y=false, y2=true: y2 is the primary axis and the y ticks are aligned to the the ones of y2. (only 1 grid) 3.) y=true, y2=true: Both axis are independent and have their own ticks. (2 grids) 4.) y=false, y2=false: Invalid configuration causes an error.

Type: boolean
Default: true for y, false for y2

Gallery Samples: NONE
Other Examples: grid_dot two-axes

pixelsPerLabel

Number of pixels to require between each x- and y-label. Larger values will yield a sparser axis with fewer ticks. This is set on a per-axis basis.

Type: integer
Default: 60 (x-axis) or 30 (y-axes)

Gallery Samples: NONE
Other Examples: value-axis-formatters

Interactive Elements

animatedZooms

Set this option to animate the transition between zoom windows. Applies to programmatic and interactive zooms. Note that if you also set a drawCallback, it will be called several times on each zoom. If you set a zoomCallback, it will only be called after the animation is complete.

Type: boolean
Default: false

Gallery Samples: highlighted-region link-interaction
Other Examples: highlighted-region link-interaction plotters

hideOverlayOnMouseOut

Whether to hide the legend when the mouse leaves the chart area.

Type: boolean
Default: true

Gallery Samples: NONE
Other Examples: gviz-selection

highlightCircleSize

The size in pixels of the dot drawn over highlighted points.

Type: integer
Default: 3

Gallery Samples: highlighted-series per-series
Other Examples: custom-circles dygraph-many-points-benchmark grid_dot independent-series per-series series-highlight unboxed-spark

highlightSeriesBackgroundAlpha

Fade the background while highlighting series. 1=fully visible background (disable fading), 0=hiddden background (show highlighted series only).

Type: float
Default: 0.5

Gallery Samples: NONE
Other Examples: NONE

highlightSeriesOpts

When set, the options from this object are applied to the timeseries closest to the mouse pointer for interactive highlighting. See also 'highlightCallback'. Example: highlightSeriesOpts: { strokeWidth: 3 }.

Type: Object
Default: null

Gallery Samples: highlighted-series
Other Examples: custom-circles series-highlight

interactionModel

TODO(konigsberg): document this

Type: Object
Default: ...

Gallery Samples: drawing interaction
Other Examples: drawing interaction

panEdgeFraction

A value representing the farthest a graph may be panned, in percent of the display. For example, a value of 0.1 means that the graph can only be panned 10% pased the edges of the displayed values. null means no bounds.

Type: float
Default: null

Gallery Samples: NONE
Other Examples: zoom

pointClickCallback

A function to call when a data point is clicked. and the point that was clicked.

Type: function(e, point)
e: the event object for the click
point: the point that was clicked See Point properties for details
Default: null

Gallery Samples: annotations callbacks
Other Examples: annotation callback

rangeSelectorHeight

Height, in pixels, of the range selector widget. This option can only be specified at Dygraph creation time.

Type: integer
Default: 40

Gallery Samples: range-selector
Other Examples: range-selector

rangeSelectorPlotFillColor

The range selector mini plot fill color. This can be of the form "#AABBCC" or "rgb(255,100,200)" or "yellow". You can also specify null or "" to turn off fill.

Type: string
Default: #A7B1C4

Gallery Samples: range-selector
Other Examples: range-selector

rangeSelectorPlotStrokeColor

The range selector mini plot stroke color. This can be of the form "#AABBCC" or "rgb(255,100,200)" or "yellow". You can also specify null or "" to turn off stroke.

Type: string
Default: #808FAB

Gallery Samples: range-selector
Other Examples: range-selector

showLabelsOnHighlight

Whether to show the legend upon mouseover.

Type: boolean
Default: true

Gallery Samples: callbacks
Other Examples: callback

showRangeSelector

Show or hide the range selector widget.

Type: boolean
Default: false

Gallery Samples: range-selector
Other Examples: iframe range-selector

showRoller

If the rolling average period text box should be shown.

Type: boolean
Default: false

Gallery Samples: annotations callbacks dynamic-update range-selector temperature-sf-ny
Other Examples: annotation callback crosshair dynamic-update fractions isolated-points missing-data numeric-gviz range-selector steps temperature-sf-ny underlay-callback

Legend

hideOverlayOnMouseOut

Whether to hide the legend when the mouse leaves the chart area.

Type: boolean
Default: true

Gallery Samples: NONE
Other Examples: gviz-selection

labelsDiv

Show data labels in an external div, rather than on the graph. This value can either be a div element or a div id.

Type: DOM element or string
Default: null

Gallery Samples: demo
Other Examples: century-scale demo label-div plugins reverse-y-axis unboxed-spark

labelsDivStyles

Additional styles to apply to the currently-highlighted points div. For example, { 'fontWeight': 'bold' } will make the labels bold. In general, it is better to use CSS to style the .dygraph-legend class than to use this property.

Type: {}
Default: null

Gallery Samples: border range-selector styled-chart-labels temperature-sf-ny
Other Examples: border customLabelCss3 range-selector styled-chart-labels temperature-sf-ny

labelsDivWidth

Width (in pixels) of the div which shows information on the currently-highlighted points.

Type: integer
Default: 250

Gallery Samples: NONE
Other Examples: customLabelCss3

labelsSeparateLines

Put <br/> between lines in the label string. Often used in conjunction with labelsDiv.

Type: boolean
Default: false

Gallery Samples: demo
Other Examples: century-scale customLabel customLabelCss3 demo plugins reverse-y-axis

labelsShowZeroValues

Show zero value labels in the labelsDiv.

Type: boolean
Default: true

Gallery Samples: NONE
Other Examples: label-div

legend

When to display the legend. By default, it only appears when a user mouses over the chart. Set it to "always" to always display a legend of some sort.

Type: string
Default: onmouseover

Gallery Samples: demo range-selector styled-chart-labels temperature-sf-ny
Other Examples: css-positioning demo multi-scale per-series plotters plugins range-selector styled-chart-labels temperature-sf-ny

showLabelsOnHighlight

Whether to show the legend upon mouseover.

Type: boolean
Default: true

Gallery Samples: callbacks
Other Examples: callback

valueFormatter

Function to provide a custom display format for the values displayed on mouseover. This does not affect the values that appear on tick marks next to the axes. To format those, see axisLabelFormatter. This is usually set on a per-axis basis. For date axes, you can call new Date(millis) to get a Date object. opts is a function you can call to access various options (e.g. opts('labelsKMB')).

Type: function(num or millis, opts, dygraph)
Default: Depends on the type of your data.

Gallery Samples: NONE
Other Examples: multi-scale value-axis-formatters

Overall display

rightGap

Number of pixels to leave blank at the right edge of the Dygraph. This makes it easier to highlight the right-most data point.

Type: integer
Default: 5

Gallery Samples: NONE
Other Examples: NONE

Rolling Averages

showRoller

If the rolling average period text box should be shown.

Type: boolean
Default: false

Gallery Samples: annotations callbacks dynamic-update range-selector temperature-sf-ny
Other Examples: annotation callback crosshair dynamic-update fractions isolated-points missing-data numeric-gviz range-selector steps temperature-sf-ny underlay-callback

Series

series

Defines per-series options. Its keys match the y-axis label names, and the values are dictionaries themselves that contain options specific to that series. When this option is missing, it falls back on the old-style of per-series options comingled with global options.

Type: Object
Default: null

Gallery Samples: annotations-native annotations independent-series
Other Examples: annotation-native annotation custom-circles dygraph-many-points-benchmark grid_dot isolated-points per-series steps two-axes-vr two-axes

Value display/formatting

digitsAfterDecimal

Unless it's run in scientific mode (see the sigFigs option), dygraphs displays numbers with digitsAfterDecimal digits after the decimal point. Trailing zeros are not displayed, so with a value of 2 you'll get '0', '0.1', '0.12', '123.45' but not '123.456' (it will be rounded to '123.46'). Numbers with absolute value less than 0.1^digitsAfterDecimal (i.e. those which would show up as '0.00') will be displayed in scientific notation.

Type: integer
Default: 2

Gallery Samples: NONE
Other Examples: NONE

labelsKMB

Show K/M/B for thousands/millions/billions on y-axis.

Type: boolean
Default: false

Gallery Samples: annotations-gviz demo no-range two-axes
Other Examples: annotation-gviz century-scale css-positioning demo grid_dot labelsKMB no-range plugins reverse-y-axis two-axes-vr two-axes

labelsKMG2

Show k/M/G for kilo/Mega/Giga on y-axis. This is different than labelsKMB in that it uses base 2, not 10.

Type: boolean
Default: false

Gallery Samples: NONE
Other Examples: labelsKMB

maxNumberWidth

When displaying numbers in normal (not scientific) mode, large numbers will be displayed with many trailing zeros (e.g. 100000000 instead of 1e9). This can lead to unwieldy y-axis labels. If there are more than maxNumberWidth digits to the left of the decimal in a number, dygraphs will switch to scientific notation, even when not operating in scientific mode. If you'd like to see all those digits, set this to something large, like 20 or 30.

Type: integer
Default: 6

Gallery Samples: NONE
Other Examples: NONE

sigFigs

By default, dygraphs displays numbers with a fixed number of digits after the decimal point. If you'd prefer to have a fixed number of significant figures, set this option to that number of sig figs. A value of 2, for instance, would cause 1 to be display as 1.0 and 1234 to be displayed as 1.23e+3.

Type: integer
Default: null

Gallery Samples: NONE
Other Examples: NONE

valueFormatter

Function to provide a custom display format for the values displayed on mouseover. This does not affect the values that appear on tick marks next to the axes. To format those, see axisLabelFormatter. This is usually set on a per-axis basis. For date axes, you can call new Date(millis) to get a Date object. opts is a function you can call to access various options (e.g. opts('labelsKMB')).

Type: function(num or millis, opts, dygraph)
Default: Depends on the type of your data.

Gallery Samples: NONE
Other Examples: multi-scale value-axis-formatters

Zooming

isZoomedIgnoreProgrammaticZoom

When this option is passed to updateOptions() along with either the dateWindow or valueRange options, the zoom flags are not changed to reflect a zoomed state. This is primarily useful for when the display area of a chart is changed programmatically and also where manual zooming is allowed and use is made of the isZoomed method to determine this.

Type: boolean
Default: false

Gallery Samples: NONE
Other Examples: is-zoomed-ignore-programmatic-zoom

Point Properties

Some callbacks take a point argument. Its properties are:
  • xval/yval: The data coordinates of the point (with dates/times as millis since epoch)
  • canvasx/canvasy: The canvas coordinates at which the point is drawn.
  • name: The name of the data series to which the point belongs