Marking Grid Points

[SamuelT]

Hi all,

I have a worksheet ('Matrix') that has a grid that is 40 rows x 40 columns. On another sheet ('Drivers') I have a two columned table where a user is enters two numbers between (you guessed it!) 1 and 40.

What I'm trying to do is within the grid, have a "Y" appear on the crossing point as denoted by the table. I've tried a couple of experiments with MATCH, but I'm not getting very far.

I've attached an example document to make this a bit clearer and I've coloured the references on the 'Drivers' sheet to correspond to where they should appear on the 'Matrix' sheet.

Sorry if that's a bit garbled. Let me know if you need any clarification.

TIA,

SamuelT