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January 16, 2017 22:04
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trying to create x axis
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<!DOCTYPE html> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<div id="chart0"></div> | |
<script> | |
var data = { "studyGuide":{ | |
"count":20, | |
"avgTime":"4 minutes and 32 seconds", | |
"unitCount": [ | |
{"name":"welcome","count":3}, | |
{"name":"1","count":10}, | |
{"name":"2","count":5}, | |
{"name":"3","count":12}, | |
{"name":"4","count":15}, | |
{"name":"5","count":2}, | |
{"name":"6","count":7} | |
] | |
}}; | |
var dataParsed = data['studyGuide']['unitCount']; | |
// set the dimensions and margins of the graph | |
var margin = {top: 20, right: 20, bottom: 30, left: 50}, | |
width = 960 - margin.left - margin.right, | |
height = 500 - margin.top - margin.bottom; | |
// set the ranges | |
var x = d3.scaleTime().range([0, width]); | |
var y = d3.scaleLinear().range([height, 0]); | |
// define the line | |
var valueline = d3.line() | |
.x(function(d) { return x(d.name); }) | |
.y(function(d) { return y(d.count); }); | |
// append the svg obgect to the body of the page | |
// appends a 'group' element to 'svg' | |
// moves the 'group' element to the top left margin | |
var svg = d3.select("#chart0").append("svg") | |
.attr("width", width + margin.left + margin.right) | |
.attr("height", height + margin.top + margin.bottom) | |
.append("g") | |
.attr("transform", | |
"translate(" + margin.left + "," + margin.top + ")"); | |
var tryParse = function(i) { | |
if(i === "welcome") { | |
return 0; | |
} | |
else { | |
return +i; | |
} | |
} | |
// format the data | |
dataParsed.forEach(function(d) { | |
d.name = tryParse(d.name); | |
d.count = +d.count; | |
}); | |
console.log("dataParsed", dataParsed); | |
// Scale the range of the data | |
x.domain(d3.extent(dataParsed, function(d) { return d.name; })); | |
y.domain([0, d3.max(dataParsed, function(d) { return d.count; })]); | |
// Add the valueline path. | |
svg.append("path") | |
.data([dataParsed]) | |
.attr("class", "line") | |
.attr("d", valueline); | |
// Add the X Axis | |
svg.append("g") | |
.attr("transform", "translate(0," + height + ")") | |
.call(d3.axisBottom(x)); | |
// Add the Y Axis | |
svg.append("g") | |
.call(d3.axisLeft(y)); | |
</script> |
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