Gnuplot plotting data from a file up to some row

Question

I have data in some text file which has let\'s say 10000 rows and 2 columns. I know that I can plot it easily by plot \"filename.txt\" using 1:2 with lines . Wh

Answer 1

Gnuplot ignores NaN values. This works for me for a specified range of the x coordinate. Not sure how to specify row range though.

cutoff(c1,c2,xmin,xmax) = (c1>=xmin)*(c1<=xmax) ? c2 : NaN
plot "data.txt" u 1:(cutoff(($1),($2),1000,2000))