Gnuplot: skipping header line from input data file

The trick is in gnuplot command - "every"

The syntax of "every" is:

plot 'file' every {point_incr}

{:{block_incr}

{:{start_point}

{:{start_block}

{:{end_point}

{:end_block}}}}}

So, in order to skip the first two lines the gnuplot command would be:

plot "data.txt" using 1:5 every ::2 with linespoints linestyle 7

This will skip the first line of the data file