[pstricks] multido

[Francisco A. S. Grossi]

Look (if you can) at this small sample; I guess the two constructions are 
equivalente and yet they produce different results.

Francisco Grossi

\documentclass[a4paper,12pt,fleqn]{book}

\usepackage[T1]{fontenc}
\usepackage[brazil]{babel}
\usepackage{pst-all,multido}

\begin{document}

\begin{figure}[H]\centering
  \begin{pspicture}(0,0)(10,10)

   % this sequence produces what I want
   \multido{\na=1.5+1.5,\ia=11+1}{6}{\cnode*[linecolor=blue](\na,1.5){3pt}{\ia}}
   \multido{\na=1.5+1.5,\ia=21+1}{6}{\cnode*[linecolor=blue](\na,3.0){3pt}{\ia}}
   \multido{\na=1.5+1.5,\ia=31+1}{6}{\cnode*[linecolor=blue](\na,4.5){3pt}{\ia}}
   \multido{\na=1.5+1.5,\ia=41+1}{6}{\cnode*[linecolor=blue](\na,6.0){3pt}{\ia}}
   \multido{\na=1.5+1.5,\ia=51+1}{6}{\cnode*[linecolor=blue](\na,7.5){3pt}{\ia}}
   \multido{\na=1.5+1.5,\ia=61+1}{6}{\cnode*[linecolor=blue](\na,9.0){3pt}{\ia}}

   % this equivalent sequence (I guess) does not produce what I want
   \multido{\nb=1.5+1.5,\ib=11+10}{6}{
     \multido{\na=1.5+1.5,\ia=\ib+1}{6}{\cnode*[linecolor=blue](\na,\nb){3pt}{\ia}}
   }

  \end{pspicture}
\end{figure}

\end{document}