Built with blockbuilder.org
Created
October 29, 2018 04:00
-
-
Save AndriiShtoiko/57e485280a5e67fb3aa3ac48a8f83a7e to your computer and use it in GitHub Desktop.
D3 study: line
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| license: mit |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| body { | |
| margin:0; | |
| position:fixed; | |
| top:0; | |
| right:0; | |
| bottom:0; | |
| left:0; | |
| } | |
| .bordered { | |
| border: 1px solid #999 | |
| } | |
| .margin-div { | |
| margin: 20px 0; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div> | |
| <svg id='svg'/> | |
| </div> | |
| <script> | |
| // NEW LESSON ************************************************* | |
| setTimeout(() => { | |
| let city = 'San Francisco'; | |
| let width = 700; | |
| let height = 300; | |
| let margin = { | |
| top: 20, | |
| bottom: 20, | |
| left: 20, | |
| right: 20, | |
| }; | |
| let svg = d3.select('svg') | |
| .attr('class', 'bordered') | |
| .attr('height', height) | |
| .attr('width', width) | |
| // Generate dummy data **************** | |
| let months = 6; | |
| let days; | |
| let data = []; | |
| while (months > 0) { | |
| days = 30; | |
| while(days > 0) { | |
| data.push({ | |
| date: new Date('2018-' + months + '-' + days), | |
| [city]: Math.round(35 * Math.random()) + 15 | |
| }) | |
| --days | |
| } | |
| --months | |
| } | |
| // console.log(data); | |
| // Finish Generate dummy data ********* | |
| // scalse | |
| let xExtent = d3.extent(data, d => d.date) | |
| // console.log(xExtent); | |
| let xScale = d3.scaleTime() | |
| .domain(xExtent) | |
| .range([margin.left, width - margin.right]); | |
| let yMax = d3.max(data, d=> d[city]); | |
| let yExtent = d3.extent(data, d=> d[city]); | |
| // console.log(yExtent); | |
| let yScale = d3.scaleLinear() | |
| .domain([0, yMax]) | |
| .range([height - margin.bottom, margin.top]) | |
| // console.log(yScale(25)) | |
| let heightScale = d3.scaleLinear() | |
| .domain(yExtent) | |
| .range([0, height - margin.top - margin.bottom]) | |
| // let rect = svg.selectAll('rect') | |
| // .data(data) | |
| // .enter().append('rect') | |
| // .attr('width', 2) | |
| // .attr('height', d => heightScale(d[city])) | |
| // .attr('x', d => xScale(d.date)) | |
| // .attr('y', d => yScale(d[city])) | |
| // .attr('fill', 'blue') | |
| // .attr('stroke', '#fff') | |
| let line = d3.line() | |
| .x(d => xScale(d.date)) | |
| .y(d => yScale(d[city])) | |
| .curve(d3.curveStep) | |
| svg.append('path') | |
| .attr('d', line(data)) | |
| .attr('fill', 'none') | |
| .attr('stroke', 'blue') | |
| let xAxis = d3.axisBottom() | |
| .scale(xScale) | |
| let yAxis = d3.axisLeft() | |
| .scale(yScale) | |
| svg.append('g') | |
| .attr('transform', 'translate('+[0, height - margin.bottom]+')') | |
| .call(xAxis) | |
| svg.append('g') | |
| .attr('transform', 'translate('+[margin.left, 0]+')') | |
| .call(yAxis) | |
| }, 10) | |
| </script> | |
| </body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment