[Gnuplot-info] read a single value from another datafile

[Peter B. <p....@vo...>]

Hi.

I'm not sure if there is a solution for this problem:
I want to read a single value from another datafile than the plotted 
file, and store the value in a variable for calculations while 
plotting.
The second datafile contains also columns of datas. So I have to 
specify the position of the value (field) where to read from.

e.g.
myvar = 'this_value_has_to_be_read_from_a_special_position_of_a_file'

plot 'datafile' using (($1-myvar)/86400):($3/$2*100)


Any ideas?
Thank you

Greetings from Germany

Peter