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loopsvariablesgnuplotscaling

GNUPlot combining loops and column scaling

I have a dataset with multiple columns of data, which I plot using a loop

plot for [i=2:19] 'myfile.txt' using 1:i

I would like to scale my data by dividing by 1024. Outside of a loop I can do this with:

plot 'myfile.txt' using 1:($2/1024)

I would like to combine these two, but the following does not work:

plot for [i=2:19] 'myfile.txt' using 1:($i/1024)

I imagine it is to do with the order that the substitutions are happening in.

Can any one show me an elegant solution here?

Many thanks

Solution

  • You can use column(i) instead of $i:

    plot for [i=2:19] 'myfile.txt' using 1:(column(i)/1024.)

    should work.