If we want to get serious about fitting functions to our data, we can turn to gnuplot's sophisticated fit command.
You need the same datafile used in the previous recipe,
rs.dat. The following figure shows the same noisy sine wave, but this time the overlaid curve seems to be perfectly smooth:
The following script will produce the previous figure:
f(x) = a*sin(b*x) fit f(x) 'rs.dat' via a, b plot 'rs.dat' with lines lw 0.5 notitle, f(x) lw 4 title "Fit by gnuplot"
fit command takes a function defined by the user containing several parameters and attempts to find the set ...