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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> /* set the CSS */ |
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.line { |
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fill: none; |
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stroke: steelblue; |
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stroke-width: 2px; |
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} |
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.grid line { |
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stroke: lightgrey; |
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stroke-opacity: 0.7; |
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shape-rendering: crispEdges; |
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} |
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.grid path { |
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stroke-width: 0; |
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} |
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</style> |
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<body> |
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<!-- load the d3.js library --> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script> |
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// set the dimensions and margins of the graph |
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var margin = {top: 120, right: 120, bottom: 120, left: 120}, |
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width = 756 - margin.left - margin.right, |
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height = 576 - margin.top - margin.bottom; |
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// parse the date / time |
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var parseTime = d3.timeParse("%d-%b-%y"); |
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var format = d3.format(".3f"); |
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// set the ranges |
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var x = d3.scaleLinear().range([0, width]) |
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var y = d3.scaleLinear().range([height, 0]); |
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// define the line |
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var valueline = d3.line() |
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.x(function(d) { return x(d.x); }) |
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.y(function(d) { return y(d.y); }) |
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.curve(d3.curveMonotoneX) |
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// append the svg obgect to the body of the page |
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// appends a 'group' element to 'svg' |
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// moves the 'group' element to the top left margin |
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var svg = d3.select("body").append("svg") |
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.attr("width", width + margin.left + margin.right) |
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.attr("height", height + margin.top + margin.bottom) |
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.append("g") |
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.attr("transform", |
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"translate(" + margin.left + "," + margin.top + ")"); |
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// gridlines in x axis function |
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function make_x_gridlines() { |
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return d3.axisBottom(x) |
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.ticks(10) |
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} |
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// gridlines in y axis function |
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function make_y_gridlines() { |
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return d3.axisLeft(y) |
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.ticks(5) |
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} |
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// Get the data |
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d3.csv("data2.csv", function(error, data) { |
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if (error) throw error; |
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// format the data |
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data.forEach(function(d) { |
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// d.date = parseTime(d.date); |
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// d.close = +d.close; |
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d.x = +d.x; |
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d.y = +d.y; |
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}); |
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console.log(data); |
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var minY = 1.33; // d3.min(data, d => d.y); |
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var maxY = d3.max(data, d => d.y); |
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var range = d3.range(minY, maxY, 0.005); |
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console.log(minY, maxY, range) |
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// Scale the range of the data |
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x.domain(d3.extent(data, function(d) { return d.x; })); |
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y.domain([minY, maxY]); |
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// add the X gridlines |
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svg.append("g") |
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.attr("class", "grid") |
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.attr("transform", "translate(0," + height + ")") |
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.call(make_x_gridlines() |
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.tickSize(-height) |
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.tickFormat("") |
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) |
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// add the Y gridlines |
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svg.append("g") |
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.attr("class", "grid") |
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.call(make_y_gridlines() |
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.tickSize(-width) |
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.tickFormat("") |
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) |
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// add the valueline path. |
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svg.append("path") |
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.data([data]) |
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.attr("class", "line") |
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.attr("d", valueline); |
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// add the X Axis |
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svg.append("g") |
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.attr("transform", "translate(0," + height + ")") |
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.call(d3.axisBottom(x)); |
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svg.append("g") |
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.attr("transform", `translate(0, ${height})`) |
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.call(customXAxis) |
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// add the Y Axis |
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svg.append("g") |
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.call(d3.axisLeft(y) |
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.tickFormat(format) |
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.tickValues(range) |
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); |
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svg.append("g") |
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.attr("id", "custom-y-axis") |
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.call(customYAxis); |
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function customXAxis(g) { |
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g.call(d3.axisBottom(x) |
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.ticks(100) |
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.tickFormat("")) |
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g.select(".domain").remove(); |
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g.selectAll(".tick").select("line").attr("y2", -6); |
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} |
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function customYAxis(g) { |
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g.call(d3.axisLeft(y) |
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.ticks(100) |
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.tickFormat("")) |
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g.select(".domain").remove(); |
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g.selectAll(".tick").select("line").attr("x2", 6); |
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} |
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}); |
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</script> |
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</body> |
