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creating cell references from text values


Posted by (Mr) Lindsay Lorden on January 03, 2002 3:32 PM

I have a need to calculate average, median, etc values from a range of cells in a sheet.

At present I modify the formula manually each month to include the extra rows for the month. I'm looking for a way to be able to construct the cell reference from other cell variables.

e.g. my cell value for calculating the average is
=AVERAGE('DataSheet'!D4:D109)

However the "109" will increase over time. Next month it will be "113" i.e. I will want it to use
=AVERAGE('DataSheet'!D4:D113)

I have experimented with the ADDRESS function & coded
=ADDRESS( B19, 1, 4, TRUE, "DataSheet" ) where "B19" is the cell reference in this sheet that contains 109 for now. I would merely need to update this cell value to 113 for next month to effect the change.

However, all =ADDRESS(...) gives me is the text value of
'DataSheet'!A109
not the value of that cell reference.

Once I can get something like this working, I can then use this "address" or other format on some 56 cells to achieve my objectives.

Can anyone tell me how to get a changing row number to substitute (a "value of a value" pointer I guess)?


Posted by Jacob on January 03, 2002 3:45 PM

Hi

Indirect() is what you want. indirect will look at the cell that a cell value says so for example if A1 has "B1" in it and B1 = 5, then if you said in C1=A1 you would get "B1", but if you said C1-indirect(A1) you get 5. Put the indirect function in place of the range and say like indirect(A1) then just change the values in A1.

Also Im not 100% sure what you are doing but if you want to take the average of something where the rows will change try this = Sum(A1:A1000)/CountA(A1:A1000) this will take the average of only the cells with some value in them and ignore the blanks.

HTH

Jacob

Posted by IML on January 03, 2002 3:47 PM

Just adding to what Jacob said, the format would be

=AVERAGE(INDIRECT("DataSheet!D4:D"&a1))

where you enter in cell A1 the active sheet the row you would like to go to.