This question already has an answer here:
- pgfplots multiple plots in one file 3 answers
I would like to know how can I choose a column from a multiple data file, and how can I operate with them.
I mean in gnuplot I used this code to plot the second column depending on the first and also take the minus one time the second.
plot "file.dat" u 1:($2*(-1))
So could someone help me which is the equivalent of using in tikz? Thank you!