Eplot

Eplot is a small graph drawing tool that can be used from command prompt via the escript eplot or it could be used from erlang code using egd_graph module.

Dependencies:

• Erlang/OTP, preferable R13B but earlier should work.

• wx, if you plan to view graph immediately Erlang should be compiled with wx support enabled. Otherwise only file output can be used.

Eplot usage:

eplot [options] file1 file2 ...

where options are:

-o Filename,        defaults to png image-format,
-type Type,         bitmap_raw | png | eps,
-width W,           Width, in pixels, of output,
-height H,          Height, in pixels, of output,
-render_engine RE,  alpha | opaque, type of render engine,
-plot Plot,         plot2d | bar2d, plot type
-x_label Label,     X-axis label,
-y_label Label,     Y-axis label,
-x_ticksize TS,     X-axis ticksize,
-y_ticksize TS,     y-axis ticksize,

example:

$> bin/eplot -o test1.png example/data1.dat example/data2.dat

egd_chart.erl usage:

See source file for info.

Eplot ToDo:

• document stuff
• different symbols for different line entries
• support multiple font and sizes (egd dependent)
• line thickness (egd dependent)
• additional graph types

EGD ToDo:

eplot uses EGD as an backend to draw graphs. EGD lacks some features which should be implemented.

• polygon triangulation, filled triangles can be drawn fine but not polygons.
• Truetype support
• Line thickness/stroke size