30. stock return chart
A single red line charts the daily "return" of a stock, indexed to a base value of 1.0, over several months in 2011. The chart maps dates on the x-axis and the return value on the y-axis, using a basis curve for smoothness. It loads and parses the data from a CSV file with `d3.csv`, formats dates with `d3.timeParse`, and uses `d3.scaleTime` and `d3.scaleLinear` for the axes. The line is rendered as an SVG path via `d3.line`, with axis elements created using `d3.axisBottom` and `d3.axisLeft`.
AI-generated descriptionThis line chart is constructed from a TSV file storing the daily average temperatures of New York, San Francisco and Austin over the last year. The chart employs conventional margins and a number of D3 features:
- d3.tsv - load and parse data
- d3.time.format - parse dates
- d3.time.scale - x-position encoding
- d3.scale.linear - y-position encoding
- d3.scale.category10, a d3.scale.ordinal - color encoding
- d3.extent, d3.min and d3.max - compute domains
- d3.keys - compute column names
- d3.svg.axis - display axes
- d3.svg.line - display line shape
forked from <a href='http://bl.ocks.org/mbostock/'>mbostock</a>'s block: <a href='http://bl.ocks.org/mbostock/3884955'>Multi-Series Line Chart</a>
forked from <a href='http://bl.ocks.org/EmbraceLife/'>EmbraceLife</a>'s block: <a href='http://bl.ocks.org/EmbraceLife/ccc9d6ee47f9e13c5bbdbd0ee9503da3'>30. Multi-Series Line Chart</a>
forked from <a href='http://bl.ocks.org/EmbraceLife/'>EmbraceLife</a>'s block: <a href='http://bl.ocks.org/EmbraceLife/aa9155f9d0baaa3429e087b34980c929'>30. stock return chart</a>