[Gnuplot-info] evaluate string in 'using' entry

[Andres C. <aci...@gm...>]

Hi,

I'm trying to create a fence plot with several non-normalized data
files. First I need to make them uniform by normalizing to the maximum
value in each dataset, using the stats command.

When plotting I need to call upon the maximum for each dataset to
normalize the column I'm trying to plot, but I just can't figure out
how to do it properly.

The minimal script below fails only in the normalization with:
warning: maxval is not a string variable

files = "file1 file2 file3"

laser_sb = 172.0

col = 3

unset key

set style data impulses

do for [i = 1 : words(files)] {

stats (word(files, i) . '.csv') using col name 'file'.i

}

set macros

maxval(n) = 'file'.n.'_max'

splot for [i = 1 : words(files)] word(files, i).'.csv' \
     using ($1 - laser_sb):(i):(column(col) / (@maxval(i))) w l