hi,

Well, I did get extract the three columns with the script, but i wanted to know how to calculate the distance and put them in an output file.

The distance calculation is between row1_row2, then row1_row3, row1_row4, row1_row5.... so on... till row6_row7.

This was the problem. I do not know how to do this iterative distance calcultion.

Thank you,