Scattered plot

We have a text file from where we want to extract two values to get a scattered plot of one value vs. the other.
The text file consists of thousands of iout_th sections.
Each iout_th section has (among other things) a subsection rreac_th with values.
We want two values, e.g. the 13th and the 36th.

We used awk to extract those two values.

The following unix command will take a given input file, i.e. ens.o02.qa7_071202b and will produce an output file datatoplot.txt that will contain two columns with the values to be plotted.

awk -f 'test.awk' ens.o02.qa7_071202b > datatoplot.txt

A scattered plot produced by Excel looks like this:



A scattered plot produced by Gnuplot looks like this:

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Another dataset (ens.o02.qa7_072402):

With points:



With dots:

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The lines typed in Gnuplot were:

set term gif
set output "plot2.gif"
set xlabel "k1"
set ylabel "k2"
plot "datatoplot.txt" with dots
quit