gnuplot legend overlaps graph

Question

Essentially, the problem that I am experiencing is that the legend overlaps the gnuplot graph that I am trying to plot as illustrated in the following diagram.

Answer 1

If you want to turn it off altogether:

gnuplot> set nokey

If you want to move the legend, you can do this with

gnuplot> set key left top

to move it to the top left. If you want to give the lines more meaningful names in the legend, use the title keyword when generating the plot:

gnuplot> plot "datafile1.txt" using 2:4 with lines title "data",
....