gnuplot

What is gnuplot?

an interactive plotting program

Step1: type “gnuplot” at your terminal

Step2: type “plot sin(x) with line”

Step3: type “plot sin(x) with point”

Learning gnuplot in 15 minutes

First 2 minutes: plotting interactively

In gnuplot you can do every think interactively

Learning gnuplot in 15 minutes

Second 2 minutes: abbreviations

Step1: Instead of typing “plot sin(x) with line” youcan type “p sin(x) w l”

Step2: Instead of typing “plot sin(x) with point” you can type “p sin(x) w p”

In gnuplot you can use lots of abbreviations

Learning gnuplot in 10 minutes

third 2 minutes: save our plot

Step1: Plot every thing you want

Step2: Type “set terminal postscript color”

Step3: Type “set output “nameofplot.ps””

Step4: Type “replot” or “rep”

In gnuplot “set” keyword use to set color, output, title, labels and ...

Learning gnuplot in 15 minutes

4th 2 minutes: set label and title

Step1: Plot every thing you want

Step2: Type “set title “plotname””

Step3: Type “set ylable “ylabel””

Step4: Type “set xlable “xlabel””

Step5: Type “replot” or “rep”

In gnuplot “set” keyword use to set color, output, title, labels and ...

Learning gnuplot in 15 minutes

5th 2 minutes: plot several plots on one windows

Step1: Type “plot sin(x) with line title “sin(x)””

Step2: Type “replot sin(x**2) with line title “sin(x^2)””

Step3: Type “replot x**2 with line title “x^2””

Step4: Type “replot ...

You can also do this: “p sin(x) w l t “sin(x), sin(x**2) w l t “sin(x^2), x**2 ...”

Learning gnuplot in 15 minutes

6th 2 minutes: set range of your plot

Step1: Type “plot [-5:5][-2:2] sin(x) with line”

Step2: Type “plot [-5:] sin(x) with line”

Step3: Type “plot [:][-2:2] sin(x) with line”

When you set a range, this range is applied for other plots

Learning gnuplot in 15 minutes

7th 2 minutes: plotting data

Step1: Type “plot “yourdata.dat” using 1:2 with line”

Step2: Type “plot “yourdata.dat” using 1:3 with line”

You can use instead of “using” its abbreviation .e.g. “u”:“p “yourdata.dat” u 1:2 w l”

Last minute

See this web sites, it will be very useful to learn more:

Goto gnuplot homepage: http://www.gnuplot.info

Goto gnuplot demos: http://www.gnuplot.info/screenshots/index.html#demos

Goto gnuplot tutorial: http://www.gnuplot.info/help.html

See also: http://t16web.lanl.gov/Kawano/gnuplot/index-e.html

Use Google to learn more about gnuplot

Other means for plotting

Origin

Sigmaplot

Xmgrace