I have around 50,000 rows of data down each sheet.
These are made up of approx 4000 areas of data. (the areas of data are
from columns A:N and between 2 and 30 rows deep)
Seperately I have a cells contain formula covering combinations of
2-30 cells deep.
I want to afix these formula to the 4000 areas.
Thus, if the first 10 rows of the sheet constituted Area 1 I would
want to refer to the complimentary 10 row formula range and afix it in
the adjoining column to the Area 1 (columnO). If the next range, Area
2, was 6 rows deep I would want to search for the 6 row formula range
and afix that to Area 2 (columnO), and so on.
Manually, over 6 sheets, I would have to do around 24,000 copy/pastes
and this isn't practical.
Does anyone know how it can be set up to run automatically??

Any helpful suggestions/comments would be appreciated. I'm familiar
with Excel macros - if that's at all useful.
Thanks.
Colwyn.