X-Value Mouseover with Droplines

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X-Value Mouseover with Droplines

✓ Published0🌍 Public

Last edited Nov 14, 2016

Created on Nov 14, 2016

This example shows a line chart of stock closing prices over time, with an interactive mouseover that identifies the data point nearest the cursor’s x-position. Two dashed droplines extend from the selected point to the x- and y-axes, and the y-value is displayed as a currency label. The chart uses D3.js (version 3.5.5) with `d3.time.scale`, `d3.svg.axis`, and `d3.svg.line` for rendering. Mouse position is converted via `scale.invert`, and the closest data point is found using `d3.bisector`. The data is loaded from a tab-separated TSV file containing dates and closing prices.

AI-generated description

forked this bl.ock and added droplines from the focus point on the series line to the x and y axes.

A line chart with mouseover so that you can read the y-value based on the closest x-value. The x-value is found using d3.mouse and scale.invert. The y-value is then found by bisecting the data.

forked from <a href='http://bl.ocks.org/micahstubbs/'>micahstubbs</a>'s block: <a href='http://bl.ocks.org/micahstubbs/d9f3cd0d926af7a5a1a8'>X-Value Mouseover with Droplines</a>

gpl-3.0 Licensed

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