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Making a bar chart

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JJL10897
Last edited Mar 9, 2022
Created on Mar 9, 2022

This example shows a bar chart where each data row from a CSV file is represented as a fixed 300-by-300 pixel rectangle, though no bar height or x-position mapping is applied. The code loads data with `d3.csv`, converts the `population` field to a number, and appends SVG `rect` elements using `selectAll` and `enter`. It uses `d3.select` for SVG selection and `d3.scaleLinear` (imported but not used), with data rendered as static squares rather than proportional bars.

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