GnuPlot

Enter gnuplot environment with 'gnuplot' command. In the interactive shell you can use the following commands.

To load a command file, which contains other commands for the gnuplot interactive shell. Lines starting with '#' are ignored.

load "plot_data.gnuplot"

• Axes ranges

set xrange [0:1000]
set yrange [-100:100]
set x2range [0:100]
set y2range [-10:10]
set autoscale

• Axes tics

set ytics nomirror
set y2tics -3.5,0.5,3.5
set y2tics auto

• Axes labels

set xlabel ""
set ylabel ""
set x2label ""
set y2label ""

• With only one or two colons in the file.

plot "data.dat"

• Specifying colons to use. If only one is specified, entry number (line number) is used for x.

plot "data.dat" using 4
plot "data.dat" using 4:5

• Several curves in the same plot

plot "data1.dat" using 4:5, "data2.dat" using 6:7

• Titles

plot "data1.dat" using 4:5 t "my curve"

• Colors

show palette colornames
plot "data1.dat" using 4:5 lt rgb "red"
plot "data1.dat" using 4:5 lt rgb "#FF0000"

• Axes : x1y1 (bottom-left), x2y2 (top-right), x1y2, x2y1

plot "data1.dat" using 4:5 axes x1y1, "data2.dat" using 6:7 axes x1y2

If you want to display different tics on y2 axis, do before the plot command:

set ytics nomirror
set y2tics -3.5,0.5,3.5
# or
set y2tics auto

• Line type

# line
plot "data1.dat" using 4:5 with lines
# line with custom line width
plot "data1.dat" using 4:5 with lines lw 4
# points
plot "data1.dat" using 4:5 with points
# points of custom type
plot "data1.dat" using 4:5 with points pt 19
# to find out point types and line width available
test

• multiplot
• other outputs, eg to generate eps files