I was confused how rangeRoundBands differed from rangeBands so made this example
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December 15, 2015 06:09
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rangeRoundBands v rangeBands
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Ordinal scale - rangeRoundBands</title> | |
| <style type="text/css"> | |
| body { | |
| text-align: center; | |
| } | |
| svg { | |
| border: 1px solid #f90; | |
| margin: 32px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <svg></svg> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script type="text/javascript"> | |
| var width = 640, | |
| height = 320 | |
| var svg = d3.select('svg') | |
| .attr('width', width) | |
| .attr('height', height) | |
| var data = d3.range(51) | |
| var x = d3.scale.ordinal() | |
| .domain(data) | |
| .rangeRoundBands([0, width]) | |
| var colors = d3.scale.category20() | |
| svg.selectAll('rect.example1') | |
| .data(data) | |
| .enter() | |
| .append('rect') | |
| .attr('class', 'example1') | |
| .style('fill', colors) | |
| .attr('x', function(d) { return x(d) }) | |
| .attr('y', 50) | |
| .attr('width', x.rangeBand()) | |
| .attr('height', 50) | |
| var x = d3.scale.ordinal() | |
| .domain(data) | |
| .rangeBands([0, width]) | |
| svg.selectAll('rect.example2') | |
| .data(data) | |
| .enter() | |
| .append('rect') | |
| .attr('class', 'example2') | |
| .style('fill', colors) | |
| .attr('x', function(d) { return Math.round(x(d)) }) | |
| .attr('y', 150) | |
| .attr('width', Math.round(x.rangeBand())) | |
| .attr('height', 50) | |
| </script> | |
| </body> | |
| </html> | |
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This has been very useful for debugging a d3 error, thanks! It is strange that rangeRoundBands does not fill the entire space compared to doing a manual round later on rangeBands. Do you have any insights on this?