[pstricks] performing calculations by avoiding fpeval

Michael Sharpe msharpe at ucsd.edu
Tue Sep 7 07:01:23 CEST 2010

On Sep 6, 2010, at 3:44 PM, mathias legrand wrote:

> In May 2010, Michael was suggesting a piece of code capable of doing calculations within a multido loop as follows:
> \newcount\MLcount%
> \multido{\i=0+1}{22}{%
>  \multido{\I=0+1}{30}{%
>     \MLcount=\I\relax\advance\MLcount\i\relax\multiply\MLcount2\relax \mypsframe{\i}{\the\MLcount}}%
>               }%
> }%
> From my experience, this only works with integers: is this true?
> If yes, how may it be generalized to real numbers?
> Thank you

The multido loops allow a control variable to be  a dimension or a real value---see the multido documentation. Be aware of the difficulties of floating point calculations within TeX---it was not designed to do this well.


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