gnuplot examples

fitting.gplot

#!/usr/bin/env gnuplot

set datafile separator ","

file="`echo $plot_file`"    # make sure to set the $plot_file environment varible first

f(x) = m * x**b             # fit to trend matching mx^b
m = 5                       # start the 'm' search at 5
b = 2                       # start the 'b' search at 2
fit f(x) file  via m,b

title_f(m, b) = sprintf('f(x) = %.2f*x^%.2f', m, b)  # display the final m and b values on the chart
plot f(x) t title_f(m,b), file

pause mouse keypress

histograms.gplot

#!/usr/bin/env gnuplot

file_name     = "accel-and-time.dat"
data_set_size = system("cat ".file_name." | wc -l")
set datafile separator ','

binc(x,s) = s*(int(x/s)+0.5)
bin_width = 0.025
set boxwidth bin_width

# $1, $2, and $3 plot histograms for columns 1-3 of the datafile
plot file_name u (bin($1,bin_width)):(1.0/(bin_width*data_set_size)) smooth frequency with boxes
pause mouse keypress

plot file_name u (bin($2,bin_width)):(1.0/(bin_width*data_set_size)) smooth frequency with boxes
pause mouse keypress

plot file_name u (binc($3,bin_width)):(1.0/(bin_width*data_set_size)) smooth frequency with boxes
pause mouse keypress

simple.gplot

#!/usr/bin/env gnuplot

set term dumb                   # use the terminal to plot
set datafile separator ","      # CSV data

#set view equal xyz             # plot axies should have the same scale
#splot "/dev/stdin"             # 3D plot
plot "/dev/stdin" using 1:3     # use columns 1 and 3 of the data for the plot (gnuplot is 0 indexed)
plot "/dev/stdin" pointtype 24  # 2D plot, using "X" as the marker
plot "/dev/stdin" with lines    # Line chart

#pause mouse keypress           # dont' immediatly close the plot