[texhax] "casting" Arrayjob to FP?

[Brandon Kuczenski]

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