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CV: Loading CSV Data
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This example demonstrates how to load and visualize data from a CSV file using React and D3 v7. It renders five circles positioned according to x and y coordinates read from `data.csv`, with interactive click-to-select behavior that highlights the chosen circle. A custom `useContainerDimensions` hook tracks the container size using `ResizeObserver`, while D3's `csv` function parses the data and `scaleLinear` maps data coordinates to screen space. The `join` method efficiently handles circle creation, updating, and removal in the SVG rendering.
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