line chart of json data in d3
14,409
Solution 1
Look at this example http://bl.ocks.org/crayzeewulf/9719255
There used 2 graphs, but you can use just one and place data as you want.
As for date you can look at this example http://jsfiddle.net/robdodson/KWRxW/, xAxis in particular.
var xAxis = d3.svg.axis()
.scale(x)
.orient('bottom')
.ticks(d3.time.days, 1)
.tickFormat(d3.time.format('%a %d'))
.tickSize(0)
.tickPadding(8);
Solution 2
What is graph1 in the below line:
var graph = d3.select(graph1).append("svg:svg").attr("width", "300"). attr("height", "150");
Author by
user1915636
Updated on July 23, 2022Comments
-
user1915636 almost 2 years
I am learning d3. I want to make a line chart using json data. The data I am using is:
var data = [ { "at": "2014-11-18T07:29:03.859Z", "value": 0.553292}, { "at": "2014-11-18T07:28:53.859Z", "value": 0.563292}, { "at": "2014-11-18T07:28:43.859Z", "value": 0.573292}, { "at": "2014-11-18T07:28:33.859Z", "value": 0.583292}, { "at": "2014-11-18T07:28:13.859Z", "value": 0.553292}, { "at": "2014-11-18T07:28:03.859Z", "value": 0.563292}];
I want "at" on x axis and "value" on y axis. Also I need to parse the "at" as time only. Please provide me pointers how i will proceed further. The code till now I have implemented is below. I tried to look for documentation for this but found none.
<html> <head> <title>line chart on json</title> <script src="http://d3js.org/d3.v2.js"></script> <style> /* tell the SVG path to be a thin blue line without any area fill */ path { stroke: steelblue; stroke-width: 1; fill: none; } </style> </head> <body> <script> var width = 400; var height = 150; var data = [ { "at": "2014-11-18T07:29:03.859Z", "value": 0.553292}, { "at": "2014-11-18T07:28:53.859Z", "value": 0.563292}, { "at": "2014-11-18T07:28:43.859Z", "value": 0.573292}, { "at": "2014-11-18T07:28:33.859Z", "value": 0.583292}, { "at": "2014-11-18T07:28:13.859Z", "value": 0.553292}, { "at": "2014-11-18T07:28:03.859Z", "value": 0.563292}]; var x = d3.scale.ordinal(); var y = d3.scale.linear().range([height, 0]); var xAxis = d3.svg.axis().scale(x).orient("bottom"); var line = d3.svg.line() .x(function(d) { return x(d.at);}) .y(function(d) { return y(d.value); }) .interpolate("linear") var graph = d3.select(graph1).append("svg:svg").attr("width", "300"). attr("height", "150"); function make_y_axis() { return d3.svg.axis().scale(y).orient("left").ticks(5) } </script> </body> </html>