gnuplot - Is it possible to use row number instead of spaces to create a 2d heat map type plot? -

I am trying to create heatmap 2 as described here:

but empty space for it Need to be in the middle of the data, while my data looks like this:

<0> 0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 1 2 0 1 0 0 1 1 2 0 2 2 2 1 2 2 2 2 2 3 1 2 4 0 3 0 3 3 3 3 3 3 3 2 3 4 3 4 4 0 4 1 1 4 2 2 4 3 4 4 4 3

Is GnuPhotot a way to use the number of entries as an indicator instead of a blank line, which is the 5th line 1 4 1 To make a verse and then start a new line?

Any suggestions? If you understand correctly and you want the first two columns (or any other columns you specify, thank you

) determine the structure of the map / data, then new lines are not required.

  plot