Question

How to measure (fitting) the slope of the curve logarithm in gnuplot?

Answer 1

Answer:

Step-by-step explanation:

I have some curves logarithm (for x axis) and I want to measure the slope of them. I tried to use the fit command in gnuplot but it is right for the line but not exactly for the curve. Here my commands:

set logscale x

f(x) = m*x + b

set fit logfile

fit [0.1:1] f(x) 'vrpsphi32v01f002' using 1:2 via m,b

plot 'vrpsphi32v01f002' using 1:2 w lp lw 2.2 t '{/Symbol F}=0.32',\

f(x) w l lw 1.5 notitle

I also used some values of m and b after they are found by the fit function

Hope it helps you....