bash - plot only specific columns in gnuplot -

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i have csv file show below , want plot s(on x axis) , b(axis).how generate plot of lines gnuplot. 

    test_image,original_size     red-room.png,918394     q,s,b,s,c,r     0,1021763,0.121086,0.00001459,-11.26,-222.18     1,1061763,0.125086,0.00001459,-11.26,-222.18     2,1051763,0.121086,0.00001459,-11.26,-222.18     3,1041763,0.121086,0.00001459,-11.26,-222.18     4,986461,0.151573,0.00003318,-7.63,-211.67     5,955766,0.160869,0.00005782,-4.07,-201.37

basically need way tell gnuplot ignore first 3 rows , plot 2rd , 3rd column.

you need tell gnuplot fields delimited commas , should plot columns 2 , 3:

set datafile separator comma plot "data.csv" using 2:3 w lp

gnuplot ignore first 3 lines automatically.





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