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I have two functions that are defined on a table, i.e. [itex]f1(x,y), f2(x,y)[/itex], where x and y are bin indices, and [itex] 1\leq f1(x,y) \leq 1 [/itex], [itex] 1\leq f2(x,y) \leq 1 [/itex].

I would like to perform some test to show whether [itex]f1(x,y)[/itex] and [itex]f2(x,y)[/itex] are significantly different. Is there some way to do this? I thought of using chi square test for [itex]f1(x,y)+n[/itex] and [itex]f2(x,y)+n[/itex], where n>1 is a constant added to make [itex]f1(x,y)[/itex] and [itex]f2(x,y)[/itex] interpretable as frequencies.

Thanks a lot!

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# Test of two distributions/functions

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