mod() function in PGF/TikZ has strange behavior for negative values

Question

It seems that the mod() function in PGF/TikZ has problems with negative values. The code

\draw [domain=-5:5, samples=100] plot (\x, {exp(mod(\x+1,2)-1)-1.5431});

will produce this:

enter image description here

Any ideas?

There are two modulo functions mod() and Mod(). You are using the wrong one. See the manual for details — percusse, Aug 18, 2013 at 22:16

Mensch · Accepted Answer · 2013-08-19 18:05:35Z

4

TikZ has two modulo functions: mod() and Mod(). Mod() will handle correctly negative values.

Mensch

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answered Aug 19, 2013 at 17:44

Arrigo

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