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Letter Count Bar Chart

✓ Published0🌍 Public

Last edited Feb 3, 2017

Created on Feb 3, 2017

A bar chart displays the frequency of each letter in the text of "Peter Piper," loaded asynchronously via `d3.text`. The chart updates live as users type in a textarea, using `d3.scaleBand`, `d3.scaleLinear`, and `d3.axisBottom`/`d3.axisRight` to render SVG bars and axes. Enter and update selections handle dynamic data changes, with a key-based data join for smooth transitions.

AI-generated description

Letter Count Bar Chart

In this demo, we asynchronously load a text file, use JavaScript to count the number of times each letter appears in that file, and generate a bar chart showing the letter count in D3.js v4.

This is meant to be an introductory demo to expose students to HTML, CSS, JavaScript, D3.js, bl.ocks.org, and blockbuilder.org for the first time.

References

This is based off the following example:

http://bl.ocks.org/sjengle/e8c0d6abc0a8d52d4b11

It has been updated for D3.js v4 based on the following updated bar chart example:

https://bl.ocks.org/mbostock/3885304

Please see the original examples for videos and additional references.

forked from <a href='http://bl.ocks.org/sjengle/'>sjengle</a>'s block: <a href='http://bl.ocks.org/sjengle/1e23258249638a508426470a48ff2924'>Letter Count Bar Chart (d3v4)</a>

forked from <a href='http://bl.ocks.org/anonymous/'>anonymous</a>'s block: <a href='http://bl.ocks.org/anonymous/8f8acad4dbf8ca7a371601519c1bf018'>Letter Count Bar Chart (d3v4)</a>

mit Licensed

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