Gnuplot is a portable command-line driven graphing utility for Linux, OS/2, MS Windows, OSX, VMS, and many other platforms. The source code is copyrighted but freely distributed (i.e., you don't have to pay for it). It was originally created to allow scientists and students to visualize mathematical functions and data interactively, but has grown to support many non-interactive uses such as web scripting. It is also used as a plotting engine by third-party applications like Octave. Gnuplot has been supported and under active development since 1986.
# Gnuplot script file for plotting data in file "force.dat" # This file is called force.p set autoscale # scale axes automatically unset log # remove any log-scaling unset label # remove any previous labels set xtic auto # set xtics automatically set ytic auto # set ytics automatically set title "Force Deflection Data for a Beam and a Column" set xlabel "Deflection (meters)" set ylabel "Force (kN)" set key 0.01,100 set label "Yield Point" at 0.003,260 set arrow from 0.0028,250 to 0.003,280 set xr [0.0:0.022] set yr [0:325] plot "force.dat" using 1:2 title 'Column' with linespoints , \ "force.dat" using 1:3 title 'Beam' with points
- DEMO Gnuplot http://gnuplot.sourceforge.net/demo/