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Last edited May 11, 2020

Created on May 11, 2020

This example shows a dual-line chart comparing the closing and opening prices of a dataset over time. Two lines are rendered on a time-scaled x-axis and a linear y-axis, with the closing price in steel blue and the opening price in red. The visualization uses D3 v4’s `d3.line`, `d3.scaleTime`, `d3.scaleLinear`, and `d3.axisBottom`/`d3.axisLeft` to generate the SVG paths and axes. Data is loaded from a CSV file with d3.csv, and dates are parsed with `d3.timeParse`.

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