[texhax] "casting" Arrayjob to FP?

[Matthew Leingang]

Brandon,

Arrayjob doesn't get array values the same way it sets them.  You have to do it like this:

\checkFooarray(1)
\def\secondnumber{\cachedata}      %% works now

The arrayjob manual has lots of examples of this.

HTH,
Matthew

On May 10, 2010, at 2:27 AM, texhax-request at tug.org wrote:

> 
> 
> 
> Hi all,
> 
> I'm trying to use arrayjob (http://ctan.org/pkg/arrayjob/)to store numerical data which I handle with pstricks.  Previously I've used fp (http://ctan.org/pkg/fp/) to perform useful arithmetic on data.  However, fp doesn't seem to play immediately well with arrayjob.
> 
> The following does not work as expected:
> 
> 
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> \documentclass{minimal}
> 
> \usepackage{fp}
> \usepackage{arrayjob}
> 
> \begin{document}
> 
> \newarray\Fooarray
> \readarray{Fooarray}{1.34}
> 
> \def\firstnumber{0.34}
> \def\secondnumber{1.34}              %% this works
> \def\secondnumber{\Fooarray(1)}      %% this doesn't
> 
> \FPadd\result\firstnumber\secondnumber
> \FPclip\result\result
> \fbox{\result}
> 
> \end{document}
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> 
> Suggestions?  How can I 'cast' an arrayjob entry to an FP value?
> 
> -Brandon

--
Matthew Leingang
Clinical Associate Professor of Mathematics
leingang at courant.nyu.edu