Re: [Gnuplot-info] Label value from file and caption under the graph

[Thomas S. <t.s...@fz...>]

you may save some time (used for positioning the contents of one
line) by writing the surrounding text into the sprintf command:

set label 1 sprintf("F = [ %.2f +/- %.2f (%.2f%%) ]
C/mol",a,a_err,a_err/a*100) at graph 0.38,0.35

set label 6 sprintf("N_A = %.5e particles/mol",a/1.602176487e-19) at graph
0.38,0.22

this has the advantage of being font size independant.


Alice5785 wrote:
> 
> Thank you very much!
> I have now what I wanted, looks a little difficult but it wirks :-)
> 
> for those who want to know how (but you will need a file.dat file with the
> columns "volumina in ml", "time in sec", "meausred height in cm"):
> 
> f(x)=a*x+b
> set fit errorvariables
> fit f(x) "file.dat" using
> ($1*(0.99458e5+1.08e3*9.81*$3*1e-2-0.94*3.08e3)*273.15/(1.01325e5*297.66)):(4.4828e3*$2)
> via a,b
> 
> set label 1 "Faraday-constant from slope of the fit" at graph 0.38,0.4
> set label 2 "F = [ " at graph 0.38,0.35
> set label 3 sprintf("%.2f +/- %.2f (%.2f%%)",a,a_err,a_err/a*100) at graph
> 0.44,0.35
> set label 4 "] C/mol" at graph 0.84,0.35
> set label 5 "from that: Avogadro-constant:" at graph 0.38,0.28
> set label 6 "N_A = " at graph 0.38,0.22
> set label 7 sprintf("%.5e",a/1.602176487e-19) at graph 0.47,0.22
> set label 8 "particles/mol" at graph 0.65,0.22
> 
> 
> important: without the "set fit errorvariables" you won't have the
> "_err"-Variables!
> 

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