Question : Coefficient of Correlation in pivot table

Coefficient of correlation
I want to set up a pivot table with X and Y values where the pivot between those 2 values is the coefficient of correlation.
It is a geological table with coeff. of corr. between Gold and Copper etc.
My level of experties is intermediate in Access and rudimentary in VB.
Thanks for your help...Jakub

Answer : Coefficient of Correlation in pivot table

Hello jakubkaiser

This is not easily done in either a pivot table or a cross-tab query. The formula itself is simple:

Correll_G_C: (Avg(Gold*Copper)-Avg(Gold)*Avg(Copper))/StDevP(Gold)*StDevP(Copper)

The difficult part is getting that into a "pivot". Normally, each cell of a pivot contains the same calculation based on different subsets of the data (different groups of rows). You want different calculations in each cell on the entire data (differents pairs of fields).

If the values are stored in different fields, this is not possible. If they are stored vertically in a table indicating metal/value pairs for samples, it might be, although it's probably not the base solution in this case either.

Would you care to exlain whether you need these figures for futher computations or merely for display?

(°v°)