How to set a line style as default for multiple plots in Gnuplot?

Question

I would like to create plot using gnuplot. The line width should be 3 in all plots. If I do it for one plot only this is done by:

set style line 1 linewidth 3


        

Answer 1

There are also other "line styles" that are set for all lines at once without index, e.g., for linespoints:

set style data linespoints
plot '-', '-'
    1, 1
    2, 2
    3, 3
    e
    1, 1
    2, 4
    3, 9
    e

Have a look at the "Style" section of the TOC of the manual http://www.gnuplot.info/docs_5.0/gnuplot.pdf for other things that can be set by default.

Answer 2

You can specify

set terminal <terminal> linewidth 3

This will change the default linewidth for all lines in the plot, including the plot borders.

If that's not what you want, you can specify all the lines in a loop (gnuplot 4.6+), where n is the number of lines you are plotting:

do for [i=1:n] {
    set style line i linewidth 3
}