replot-scatter: Scatter charts for react

Intelligent and customizable scatter plot components for react.

Installation

Only works with React projects. React must be installed separately.

npm install replot-scatter

Then with a module bundler like webpack/browserify that supports CommonJS/ES2015 modules, use as you would anything else.

import ScatterPlot from 'replot-scatter'

Quick Start

replot-scatter is designed to easily create ScatterPlots. The only required input is proper JSON formatted data.

In the simplest case, just supply data (as a Javascript array) and specify the keys associated with the values:

render() {
  let data = [
    {height: 70, weight: 155},
    {height: 72, weight: 144},
    {height: 73, weight: 158},
    {height: 72, weight: 160},
    {height: 77, weight: 186},
    {height: 68, weight: 153},
    {height: 69, weight: 160},
    {height: 67, weight: 166},
    {height: 60, weight: 90},
    {height: 63.5, weight: 100},
    {height: 62, weight: 102},
    {height: 65, weight: 112},
    {height: 59, weight: 90},
    {height: 58.5, weight: 95},
    {height: 61.5, weight: 115},
    {height: 69, weight: 125},
    {height: 70, weight: 135},
  ],

  return(
    <ScatterPlot data={data}
        xKey="height"
        yKey="weight" />
  )
}

• data is the only required prop
• xKey defaults to "x"
• yKey defaults to "y"

Groups and Weights

Replot ScatterPlots support displaying multiple distibutions of points. If a groupKey prop is included, the points on the ScatterPlot will be colored according to their groups.

Replot ScatterPlots also support variable size points according to a weight. If a weightKey prop is included, the points will be sized according to their weight. The user can also specify minRadius and maxRadius props to alter the range in sizes of the circles. If no weightKey is specified, all circles will assume a size of minRadius.

render() {
  let data = [
    {gender: "male", height: 70, weight: 155, shoeSize: 10},
    {gender: "male", height: 72, weight: 144, shoeSize: 12},
    {gender: "male", height: 73, weight: 158, shoeSize: 11.5},
    {gender: "male", height: 72, weight: 160, shoeSize: 11},
    {gender: "male", height: 77, weight: 186, shoeSize: 13},
    {gender: "male", height: 68, weight: 153, shoeSize: 10},
    {gender: "male", height: 69, weight: 160, shoeSize: 9},
    {gender: "male", height: 67, weight: 166, shoeSize: 9.5}
    {gender: "female", height: 60, weight: 90, shoeSize: 6},
    {gender: "female", height: 63.5, weight: 100, shoeSize: 6.5},
    {gender: "female", height: 62, weight: 102, shoeSize: 6.5},
    {gender: "female", height: 65, weight: 112, shoeSize: 7},
    {gender: "female", height: 59, weight: 90, shoeSize: 6},
    {gender: "female", height: 58.5, weight: 95, shoeSize: 5.5},
    {gender: "female", height: 61.5, weight: 115, shoeSize: 6},
    {gender: "female", height: 69, weight: 125, shoeSize: 8},
    {gender: "female", height: 70, weight: 135, shoeSize: 8.5}
  ]

  return(
    <ScatterPlot data={data}
        xKey="height"
        yKey="weight"
        groupKey="gender"
        weightKey="shoeSize"/>
  )
}

API

Dimensions

Dimensions may be specified by passing in width and height props with numbers in the unit of pixels.

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
    	width={600}
      	height={450}
    />
  )
}

• width defaults to 800
• height defaults to 600

The Scatter Plot will not function with a width that is less than 60 pixels, or with a height that is less than 100 pixels.

Width dimensions may also be specified with a string, as a percentage. The width will then be calculated as a proportion of the parent container.

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
        width="50%"
        height={450}
    />
  )
}

Default	width={600} height={450}	width="50%" height={450}

Colors

Colors may be specified through 2 different mechanisms, both through a color prop. If none of the mechanisms are specified, ScatterPlot defaults to a built in color palette.

User-provided Color Palette

Users can specify a list of colors to use as a palette, passed to the color prop.

render() {
  let colors = ["#ff3232", "#ff7f7f", "#ffcccc"]

  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
    	color={colors}
    />
  )
}

User-provided Color function

The user can specify the color for various lines by providing a function as well. Expected arguments to the function are the index of the data series (from 0) and the group associated with the line (if it exists).

let colorMe = (i, group) => {
  if (group === "male") {
    return "blue"
  } else {
    return "pink"
  }
}

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
    	color={colorMe}
    />
  )
}

color={colors}	color={colorMe}

Graph Style

Users can customize the style of graph elements by passing in the prop(s) below:

• showTrendline: defaults to false, controls display of the trendline
• trendlineColor
  • Determines the color of the drawn trendline
  • Defaults to #AAA
  • Accepts any color string
• trendlineWidth
  • Determines the width of the drawn trendline
  • Defaults to 1.5
  • Accepts any number
• trendlineOpacity
  • Determines the opacity of the drawn trendline
  • Defaults to 1
  • Accepts any number

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
    	showTrendline={true}
	trendlineColor="#ff0000"
	trendlineWidth={3}
	trendlineOpacity={0.5}
    />
  )
}

Default	showTrendline={true}	Custom Trendline

Axis Customization

Replot ScatterPlots allow for incredible customization of the graph axis. A complete explanation of axis customization can be found below:

Titles

Title props accept strings to display in the appropriate location on the graph. To compensate for the inclusion of a title, graph content will be condensed, but the overall size of the component will stay constant.

• graphTitle: string displayed above the graph
• xTitle: string displayed left of the x-axis
• yTitle: string displayed under the y-axis

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
      graphTitle="Shoe Size by Height and Weight"
      xTitle="Height"
      yTitle="Weight"
    />
  )
}

Default	Custom titles

Displaying Axis Elements

Users can customize the display of the lines, labels, and gridlines of the axes.

• showXAxisLine: defaults to true, controls display of the x-axis line
• showYAxisLine: defaults to true, controls display of the y-axis line
• showXLabels: defaults to true, controls display of labels on the x-axis
• showYLabels: defaults to true, controls display of labels on the y-axis
• showGrid: defaults to true, controls display of gridlines

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
      	showXAxisLine={false}
	showYAxisLine={false}
	showXLabels={false}
	showYLabels={false}
	showGrid={false}
    />
  )
}

Lines hidden	Labels hidden

Axis Scale

Users can control the x and y scales of the graph, linear or logarithmic.

• xScale: defaults to "lin" for linear scale, can be "log" for logarithmic scale
• yScale: defaults to "lin" for linear scale, can be "log" for logarithmic scale

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
    	xScale="log"
      	yScale="log"
    />
  )
}

Default	xScale="log" yScale="log"

Axis Style

Users can customize the axis style by passing in the prop(s) below:

• axisColor
  • modifies the color of axis lines
  • defaults to "#AAA"
  • accepts any color string
• tickColor
  • modifies the color of axis ticks
  • defaults to "#AAA"
  • accepts any color string
• gridColor
  • modifies the color of axis gridlines
  • defaults to "#AAA"
  • accepts any color string
• labelColor
  • modifies the color of both axis labels
  • defaults to "#AAA"
  • accepts any color string
• graphTitleColor
  • modifies the color of all graph titles
  • defaults to "#AAA"
  • accepts any color string

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
      	axisColor="#ff0000"
	tickColor="#ff0000"
	gridColor="#ff0000"
	labelColor="#ff0000"
	graphTitleColor="#ff0000"
    />
  )
}

• axisWidth
  • modifies the thickness of axis lines
  • defaults to 1.5
  • accepts any number
• tickWidth
  • modifies the thickness of axis ticks
  • defaults to 1.5
  • accepts any number
• gridWidth
  • modifies the thickness of axis gridlines
  • defaults to 1
  • accepts any number

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
      	axisWidth={5}
	tickWidth={5}
	gridWidth={5}
    />
  )
}

• axisOpacity
  • modifies the opacity of axis lines
  • defaults to 1
  • accepts any number
• tickOpacity
  • modifies the opacity of axis ticks
  • defaults to 1
  • accepts any number
• gridOpacity
  • modifies the opacity of axis gridlines
  • defaults to 0.5
  • accepts any number

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
      	axisOpacity={0.2}
	tickOpacity={0.2}
	gridOpacity={0.2}
    />
  )
}

Custom colors	Custom widths	Custom opacities

• labelFontSize
  • sets the font size of both axis labels
  • automatically calculated when unspecified
  • accepts any number
• graphTitleFontSize
  • sets the font size of all graph titles
  • automatically calculated when unspecified
  • accepts any number

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
        labelFontSize={8}
    	graphTitleFontSize={10}
    />
  )
}

• labelFontFamily
  • sets the font family of both axis labels
  • inherits when unspecified
  • accepts any font family name string
• graphTitleFontFamily
  • sets the font family of all graph titles
  • inherits when unspecified
  • accepts any font family name string

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
	labelFontFamily="Courier"
	graphTitleFontFamily="Courier"
    />
  )
}

Custom font sizes	Custom font families

Legend Customization

Users can customize the graph legend in several ways.

• showLegend: defaults to true, controls display of the legend

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
	showLegend={false}
    />
  )
}

Default	showLegend={false}

Legend Style

Users can customize the legend style by passing in the prop(s) below:

• legendFontColor
  • Modifies the color of the font used in the legend
  • Defaults to "#AAA"
  • Accepts any color string
• legendBackground
  • Modifies the background color of the legend
  • Defaults to "none"
  • Accepts any color string
• legendShowBorder
  • Determines whether a border will be drawn around the legend
  • Defaults to false
  • Accepts true or false
• legendBorderColor
  • Modifies the color of the border of the legend
  • Defaults to "#AAA"
  • Accepts any color string

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
	legendFontColor="#ff0000"
	legendBackground="#ffffff"
	legendShowBorder={true}
	legendBorderColor="#ff0000"
    />
  )
}

Default	Custom Style

• legendFontSize
  • sets the font size of legend texts
  • automatically calculated when unspecified
  • accepts any number
• legendFontFamily
  • sets the font family of legend texts
  • inherits when unspecified
  • accepts any font family name string

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
  legendFontSize={10}
  legendFontFamily="Courier"
    />
  )
}

Default	legendFontSize={10}	legendFontFamily="Courier"

Tooltip

Tooltips can display more specific information about a data series.

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
	tooltip={false}
	tooltipColor="light"
    />
  )
}

• tooltip defaults to true, false turns the tooltip off
• tooltipColor defaults to dark, it can be set to light or dark

Default tooltip	tooltipColor="light"	tooltip={false}

Customizing Tooltip contents

Users can customize what is displayed inside the tooltip with a function. Expected arguments to the function are the data for the specific point hovered over. The function should return JSX.

let fillTooltip = (pointData) => {
  return(
    <span>The gender for this point is {pointData.gender}</span>
  )
}

render() {
  return(
    <ScatterPlot data={data} xKey="height" yKey="weight" groupKey="gender" weightKey="shoeSize"
	tooltipContents={fillTooltip}
    />
  )
}

Animation Customization

Users can control the initial animation of the graph, points growing out from the trendline.

• initialAnimation: defaults to true, controls the animation