https://bl.ocks.org/d3noob/629790fc15cc1afba0253f29a4d246e7

其他 2020-07-23 16:08:26 阅读次数: 0
https://bl.ocks.org/d3noob/629790fc15cc1afba0253f29a4d246e7

This is a simple line graph written to illustrate a method of changing the colour of an axis in v4 of d3.js.

I suspect that it is not the best or most efficient method, so I am standing this up as an example to seek advice on a better solution. The question asked on Stack Overflow is here

forked from the block: Simple line graph with v4

index.html#

<!DOCTYPE html>
<meta charset="utf-8"> <style> /* set the CSS */ .line { fill: none; stroke: steelblue; stroke-width: 2px; } .axisRed line{ stroke: red; } .axisRed path{ stroke: red; } .axisRed text{ fill: red; } </style> <body> <!-- load the d3.js library --> <script src="https://d3js.org/d3.v4.min.js"></script> <script> // 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; // parse the date / time var parseTime = d3.timeParse("%d-%b-%y"); // 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.date); }) .y(function(d) { return y(d.close); }); // 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("body").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 + ")"); // Get the data d3.csv("data.csv", function(error, data) { if (error) throw error; // format the data data.forEach(function(d) { d.date = parseTime(d.date); d.close = +d.close; }); // Scale the range of the data x.domain(d3.extent(data, function(d) { return d.date; })); y.domain([0, d3.max(data, function(d) { return d.close; })]); // Add the valueline path. svg.append("path") .data([data]) .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") .attr("class", "axisRed") .call(d3.axisLeft(y)); }); </script> </body>

data.csv

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