Having “automatic” x

Question

Just a simple question (I imagine) but, lets say I have the following data file:

# no x data, it\'s sampled for instance each second.
23 42 48 
49 89 33
39 4         


        

Answer 1

If you don't want to rely on awk, gnuplot can do this as well. See help plot datafile using and help plot datafile using pseudocolumns. Try:

plot "file.dat" using (column(0)):3