indexing - How to divide data from different index with gnuplot? -

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i've not found way (maybe because there none?):
i've got different set of data such :

#index 1 

1 4   2 8   3 12   4 16   5 20

#index 2 

1 1   2 4   3 9   4 16   5 25

and i'd :
plot using 1:($(index1:2)/$(index2:2))

i.e. dividing value of first set of second set (to normalize)

is there way gnuplot?

i can't in gnuplot level. try use join unix command.


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