[Gnuplot-info] Iteration with two commands

[<tar...@gm...>]

Hi,
I'm trying to build a sort of bar-chart using a simple
data file (data_dlex) containing only 0 or 1. I'm using the following code:

set style histogram rowstacked title textcolor lt -1
set datafile missing 'nan'
set style data histograms

plot '.data_dglob' using 2:xticlabel(1) lt -1 ,\ 
'.data_dlex' using ( $2==0 ? 1 : 0 ) ls 17 title 'NA' ,\ 
'' using ( $2==1 ? 1 : 0 ) ls 1 ,\ 
for [i=3:19] '.data_dlex' using ( column(i)==0 ? 1: 0) ls 17 notitle ,\ 
for [i=3:19] '' using ( column(i)==1 ? 1: 0) ls i-1

where the last two commands iterate over a potentially large number of
columns stacking white or colored boxes depending on the value of column
(i). To keep the same color order among different columns I would need to
merge the two iterations into a single one with two commands.

Is it possible? Any suggestion on how to do that?

Thanks in advance.