Gnuplot: getting functions to talk to titles and saveing parameters to a file.

[Pha07psm]

Hi. I am doing a PhD atm and I have decided to take the plunge with gnuplot. I have fitted some data to an equation h(t)=ho+a(t-to)^b+kt, with a, to, b and k being fitting constants (empirical formulae describing creep behaviour of a compressed material with time).

Does anybody know how I can:

1) make these constants come up so the specific equation comes up in the text describing the line?

2) make gnuplot save these constants in a dat or csv or whatever for future reference?


Any help would be massively appreciated!

 

[NateD]

Thanks!For 1), you can use the set label command in gnuplot to label your line with the equation and parameters. For example, if your equation is h(t)=ho+a(t-to)^b+kt, you can add the following label to the plot: set label "h(t)=ho+a(t-to)^b+kt, a=%g, to=%g, b=%g, k=%g" at graph 0.5, 0.9 This will make the label show up on your graph with the appropriate parameters substituted in. For 2), you can use the set print command in gnuplot to save the parameters to a file. For example, if you want to save the parameters to a file called "parameters.dat", you can use the command: set print "parameters.dat" print a, to, b, k This will save the parameters to the file in comma-separated values.