Gnuplot 4.2 Tutorial

GNUPLOT 4.2 - A Brief Manual and Tutorial Department of Civil and Environmental Engineering Edmund T. Pratt School of Engineering Duke University - Box 90287, Durham, NC 27708-0287 1. INSTALLING AND STARTING GNUPLOT - version 4.2 Gnuplot is a free, command-driven, interactive, function and data plotting program. Pre-compiled executeables and source code for Gnuplot 4.2.4 may be downloaded for OS X

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7. CURVE-FITTING WITH GNUPLOT To fit the data in force.dat with a function use the commands: f1(x) = a1*tanh(x/b1) # define the function to be fit a1 = 300; b1 = 0.005; # initial guess for a1 and b1 fit f1(x) 'force.dat' using 1:2 via a1, b1