Gnuplot

• http://www.gnuplot.info/
• http://www.cs.uni.edu/Help/gnuplot/
• http://www.tu-chemnitz.de/urz/anwendungen/grafik/gnuplotdoc.html

common functions in gnuplot

• arcustangens: atan(x)

fastest way to get a plot without matlab etc.

(with cygwin on windows)

 gnuplot
 set terminal postscript
 set output "output.ps"
 plot 1/log(x)
 quit
 ps2pdf output.ps
 ./acroread output.pdf

2D plot

 plot sin(x**2)

3D plots

 splot [x=-5:5] [y=-5:5] y*sin(x**2)

common things

 gnuplot
 plot sin(x)
 plot [0:4] sin(x)
 help set
 set variable wert
 set xlabel "X-Achse"
 set ylabel "Y-Achse"
 set xrange [0:4]
 sest yrange [-1:1]
 plot sin(x)

 set terminal
 set terminal postscript
 set terminal png
 set output "testplot.png"
 plot sin(x)

 Pi=3.1415
 set xrange [-1*Pi:2*Pi]
 a=0.6
 plot a*sin(x)

 func(x)=var*sin(x)
 var=0.5
 plot func(x)

 ! cat messdaten.txt
 1 -5 3 -7 4
 set xrange [0:3]
 set yrange [-10:10]
 set xlabel "bla"
 set ylabel "blub"
 plot "messdaten.txt" usin 1:2 t "Linientitel"
 replot
 save "history.gplot"
 quit

 load "history.gplot"