Basic charts in go.

This package focuses more on autoscaling, error bars, and logarithmic plots than on beautifull or marketing ready charts.

The following chart types are implemented:

• Strip Charts
• Scatter / Function-Plot Charts
• Histograms
• Bar and Categorical Bar Charts
• Pie/Ring Charts
• Boxplots

• Axis can be linear, logarithmical, categorical or time/date axis.
• Autoscaling with lots of options
• Fine control of tics and labels

Package chart itself provideds the charts/plots itself, the charts/plots can be output to different graphic drivers. Currently

• txtg: ASCII art charts
• svgg: scalable vector graphics (via github.com/ajstarks/svgo), and
• imgg: Go image.RGBA (via code.google.com/p/draw2d/draw2d/ and code.google.com/p/freetype-go) are implemented.

For a quick overview save as xbestof.{png,svg,txt} run

  $ example/example -best

A fuller overview can be generated by

  $ example/example -All

• Style handling (especialy colour) is a bit of a mess .
• Text based charts are cute. But the general graphics would be much easier without.
• Time handling code dates back to pre Go1, it should be reworked.