Gnuplot/C Update II

A new version of Gnuplot/C has been uploaded to SourceForge that includes polar plotting capabiliites : https://sourceforge.net/projects/gnuplotc/.

This adds logarithmic x-axis support to the existing plot types.

Here is an image showing the capabilities :

The DTMF tones were generated using the SigLib DSP library.

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Numerix-DSP Libraries : http://www.numerix-dsp.com/eval/

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