plot 'file' every {<column_incr>} {:{<row_incr>} {:{<start_column>} {:{<start_row>} {:{<end_column>} {:<end_row>}}}}}
plot 'file' matrix every :::N::N # plot all values in row N of matrix plot 'file' matrix every ::3::7: # plot columns 3 to 7 of all rows plot 'file' matrix every ::3:2:7:4 # submatrix of columns 3-7 rows 2-4