Line Chart
A line chart or line graph displays the evolution of one or several numeric variables. Data points are connected by straight line segments. It is similar to a scatter plot except that the measurement points are ordered (typically by their x-axis value) and joined with straight line segments. A line chart is often used to visualize a trend in data over intervals of time – a time series – thus the line is often drawn chronologically. When several values are available for each time stamp, data can be aggregated and a confidence zone is generally added around the trend.
Example Color Themes
<head>
<!-- Include the CanvasXpress library in your HTML file -->
<link rel="stylesheet" href="https://www.canvasxpress.org/dist/canvasXpress.css" type="text/css"/>
<script src="https://www.canvasxpress.org/dist/canvasXpress.min.js"></script>
</head>
<body>
<!-- Create a canvas element for the chart with the desired dimensions -->
<div>
<canvas id="canvasId" width="600" height="600"></canvas>
</div>
<!-- Create a script to initialize the chart -->
<script>
// Create the data for the graph
var data = {
"y" : {
"data" : [
[118,30],
[484,58],
[664,87],
[1004,115],
[1231,120],
[1372,142],
[1582,145],
[118,33],
[484,69],
[664,111],
[1004,156],
[1231,172],
[1372,203],
[1582,203],
[118,30],
[484,51],
[664,75],
[1004,108],
[1231,115],
[1372,139],
[1582,140],
[118,32],
[484,62],
[664,112],
[1004,167],
[1231,179],
[1372,209],
[1582,214],
[118,30],
[484,49],
[664,81],
[1004,125],
[1231,142],
[1372,174],
[1582,177]
],
"smps" : ["Days Old","Circumference (mm)"],
"vars" : [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35]
},
"z" : {
"Tree" : ["Tree-1","Tree-1","Tree-1","Tree-1","Tree-1","Tree-1","Tree-1","Tree-2","Tree-2","Tree-2","Tree-2","Tree-2","Tree-2","Tree-2","Tree-3","Tree-3","Tree-3","Tree-3","Tree-3","Tree-3","Tree-3","Tree-4","Tree-4","Tree-4","Tree-4","Tree-4","Tree-4","Tree-4","Tree-5","Tree-5","Tree-5","Tree-5","Tree-5","Tree-5","Tree-5"]
}
}
// Create the configuration for the graph
var config = {
"colorBy":"Tree",
"graphOrientation":"horizontal",
"graphType":"Scatter2D",
"lineBy":"Tree",
"showLegend":false,
"title":"Growth of Orange Trees"
}
// Call the CanvasXpress function to create the graph
var cX = new CanvasXpress("canvasId", data, config);
</script>
</body>
library(canvasXpress)
y=read.table("https://www.canvasxpress.org/data/cX-oranges2-dat.txt", header=TRUE, sep="\t", quote="", row.names=1, fill=TRUE, check.names=FALSE, stringsAsFactors=FALSE)
z=read.table("https://www.canvasxpress.org/data/cX-oranges2-var.txt", header=TRUE, sep="\t", quote="", row.names=1, fill=TRUE, check.names=FALSE, stringsAsFactors=FALSE)
canvasXpress(
data=y,
varAnnot=z,
colorBy="Tree",
graphOrientation="horizontal",
graphType="Scatter2D",
lineBy="Tree",
showLegend=FALSE,
title="Growth of Orange Trees"
)
