Multi-Series Line Chart
This multi-series line chart displays daily average temperatures for New York, San Francisco, and Austin over a year, sourced from a TSV file. Each city’s temperature trend is drawn as a colored line, with points highlighted by circles and extreme values (below 20° or above 89°) labeled directly on the plot. The visualization uses D3 v4 APIs such as `d3.tsv` for data parsing, `d3.timeParse` for date handling, `d3.scaleTime`, `d3.scaleLinear`, `d3.scaleOrdinal` and `d3.schemeCategory10` for encoding, and `d3.line` with SVG paths to render the series.
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>