I was wondering which method people would recommend to do teh following.

There are two workbooks Old.xls and New.xls. I need to compare the
value/string in each cell in Column A in Old.xls with the cells in Column A
in New.xls. When matched then the value in Column I in Old.xls must be added
to the value in the corresponding row in Column I in New.xls

So...is it better to do row by row comparison and a single addition between
workbooks?

Or should I create an array from the Old.xls with just Column A and Column I
and then do the comparison and addition?

Or should I create ranges of Column A in the New.xls and do the comparison
with an Intersect function?

Or...?

There are always better ways to do things and I would like to see what
others have experienced.

thanks

Not sure if it is the fastest but my approach would be to put ColA New and
ColA Old into an array, scan the array for differences and write a new colI
value where the same. I experience faster response than reading each row in
directly from the sheet.

--
Cheers
Nigel



"Glen" wrote in message
...
I was wondering which method people would recommend to do teh following.

There are two workbooks Old.xls and New.xls. I need to compare the
value/string in each cell in Column A in Old.xls with the cells in Column
A
in New.xls. When matched then the value in Column I in Old.xls must be
added
to the value in the corresponding row in Column I in New.xls

So...is it better to do row by row comparison and a single addition
between
workbooks?

Or should I create an array from the Old.xls with just Column A and Column
I
and then do the comparison and addition?

Or should I create ranges of Column A in the New.xls and do the comparison
with an Intersect function?

Or...?

There are always better ways to do things and I would like to see what
others have experienced.

thanks

Seconded.

--
HTH

Bob Phillips

(replace somewhere in email address with gmail if mailing direct)

"Nigel" wrote in message
...
Not sure if it is the fastest but my approach would be to put ColA New and
ColA Old into an array, scan the array for differences and write a new
colI
value where the same. I experience faster response than reading each row
in
directly from the sheet.

--
Cheers
Nigel



"Glen" wrote in message
...
I was wondering which method people would recommend to do teh following.

There are two workbooks Old.xls and New.xls. I need to compare the
value/string in each cell in Column A in Old.xls with the cells in
Column
A
in New.xls. When matched then the value in Column I in Old.xls must be
added
to the value in the corresponding row in Column I in New.xls

So...is it better to do row by row comparison and a single addition
between
workbooks?

Or should I create an array from the Old.xls with just Column A and
Column
I
and then do the comparison and addition?

Or should I create ranges of Column A in the New.xls and do the
comparison
with an Intersect function?

Or...?

There are always better ways to do things and I would like to see what
others have experienced.

thanks