Gnuplot: Frequently Asked Questions

• http://stackoverflow.com/questions/tagged/gnuplot – Newest 'gnuplot' Questions - Stack Overflow
• http://lowrank.net/gnuplot/index-e.html – Not so Frequently Asked Questions.

This is an inofficial gnuplot FAQ (yes, its my personal one).

• Gnuplot line types ¹⁾
• Consistent fonts in gnuplot? ²⁾
• Mutiple fit lines on same plot in gnuplot? ³⁾
• How to fit a function with multiple data sets using gnuplot
• How can I make a gnuplot script an executable file?
• How do I change the datafield separator?
• How do I change decimal separator?
• How do I export a plot as list of ASCII-data samples?
• How to change plot device/output media?
• How do I change output format of numbers?
• Where can I find the official gnuplot FAQ?
• How to add Gnuplot color syntax support to Geany editor?
• How do I change background color of screen and/or graph?
• How to change linestyle (e.g. line width) for a set of lines?
• How to set line colors to MATLAB default colors?
• How can I add a watermark?
• How to plot multiple y-axes?
• Is there an overview about the predefined gnuplot colors?

Look here. – Note that there are also some not so Frequently Asked Questions.

Add the shebang to the first line of your script ¹⁾

#!/usr/bin/env gnuplot
plot sin(x) with lines

E.g. to read in csv (comma-separated value) files written by spreadsheet programs.

set datafile separator ","

set decimalsign ','                     # set separator to ','
#set decimalsign locale                 # get separator from system locale settings
#set decimalsign locale "en_GB.utf8"    # set separator to '.' by overriding system locale
#set decimalsign locale "de_DE.utf8"    # set separator to ',' by overriding system locale

set table
#set terminal table  # some releases of gnuplot need the keyword 'terminal'
set output "temp(u).dat"
set samples 1024
plot [0:1023] f(x*4.8/1024)

set terminal emf           # Windows Enhanced Meta File
set output "filename.emf"
replot                     # plot again but utilize the new terminal
set term pop               # return to primary terminal

set format "%.1f"  # output float numbers with one digit after decimal separator

set format y "%.1f"

# define screen background color
set object rectangle from screen 0,0 to screen 1,1 fillstyle border fillcolor '#deebf7' behind
 
# define graph background color
set object rectangle from graph 0,0 to graph 1,1 fillstyle border fillcolor 'white' behind

set for [i=1:8] style line i linewidth 3

# New default Matlab line colors, introduced together with parula (2014b)
set style line 1 lc rgb '#0072bd' # blue
set style line 2 lc rgb '#d95319' # orange
set style line 3 lc rgb '#edb120' # yellow
set style line 4 lc rgb '#7e2f8e' # purple
set style line 5 lc rgb '#77ac30' # green
set style line 6 lc rgb '#4dbeee' # light-blue
set style line 7 lc rgb '#a2142f' # red

# Urheberkennzeichnung
watermark = "`whoami`".'\@'."`hostname`, `date`"
set label watermark at screen 0.01,0.02 font ',6' tc rgb 'gray'
#set bmargin 3.75

• https://stackoverflow.com/questions/27390317/how-to-plot-multiple-y-axes ¹⁾
• https://stackoverflow.com/questions/72197168/how-to-plot-several-y-axis-in-the-left-side-using-gnuplot ²⁾

• https://stackoverflow.com/questions/54658674/gnuplot-apply-colornames-from-datafile ¹⁾