[Gnuplot-info] plot using unique and ranges

[Leonardo L. F. <leo...@gm...>]

Hello,

I am ploting three data files using the "smooth unique" option 
in the following way:

plot "file1" using 1:2 title 'A' w lines smooth unique, 
"file2"  using 1:2 title 'B' w lines smooth unique, 
"file3" using 1:2 title 'C' w lines smooth unique

I would like to know if it is possible to do this same plot but 
showing the ranges of the values in the y axis 
(i.e. to evaluatethe variance), instead of only the averages.

Thank you very much.