Thank you both Sven and Riccardo for your help.
I did now in this way, and it works fine.

----------------------------------------------
loop i=1..models --quiet
   colind = ""
   k = nelem(mod$i)  
   loop j=1..k #--quiet
       sprintf colind "%s $j", colind
   end loop
   TR_fw_$i <- gnuplot @colind --with-lines --time-series --matrix=trace_fw_$i
end loop
----------------------------------------------

Best,
Artur

2011/12/5 Riccardo (Jack) Lucchetti <r.lucchetti@univpm.it>
On Mon, 5 Dec 2011, Sven Schreiber wrote:

sprintf strColindices "%d", seq(1,cols(mymatrix))
gnuplot @strColindices --with-lines <etc>

A technical note to Sven's idea: the problem is not the space (or lack thereof): a print format like "%3d" would have solved the problem; the problem is that when you "printf" a matrix, a newline is automtically appended, which confuses the gnuplot command.


Riccardo (Jack) Lucchetti
Dipartimento di Economia
Universitą Politecnica delle Marche

r.lucchetti@univpm.it
http://www.econ.univpm.it/lucchetti

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