Store \pgfmathresult in a variable

Question

The result of \pgfmathparse is automatically stored in \pgfmathresult. Is it possible to store it in an other variable, too?

Answer 1

Use \pgfmathsetmacro\mymacro{...} instead of \pgfmathparse{...}.

From the v2.10 pgfmanual, section 62.1 Commands for Parsing Expressions, page 527:

\pgfmathsetmacro{<macro>}{<expression>}
Defines <macro> as the value of <expression>. The result is a decimal without units.

\pgfmathsetlengthmacro{<macro>}{<expression>}
Defines <macro> as the value of <expression> LaTeX in points.

\pgfmathtruncatemacro{<macro>}{<expression>}
Defines <macro> as the truncated value of <expression>.

In theory you could also say \let\mymacro\pgfmathresult, but I recommend the above macros.

Answer 2

I guess with

\edef\myvar{\pgfmathresult}

when the value from \pgfmathparse has been computed. Or \xdef instead of \edef if you need it globally, i.e., outside the TiKZ environment in which the computation is performed.