Thanks for your help, You mean there is no approximation method, like adding 0.5 to each cell, to do this case?
If there is no varation in one varible. I want know that if there is relation between these 2 variable, How can I do? I mean: position 1 position 2 A B A B A B ... .. A B A C I want to know if A and B are something "close" in relation, How can I do in statistics? ( If I can not use phi correlation coefficient.) Thanks a lot Rich Ulrich <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > On 21 Aug 2003 12:54:29 -0700, [EMAIL PROTECTED] (Garbriel) wrote: > > [ ... ] > > > > However, there is limitations in this calculation, > > > > since if X- is zero, so, a21=0, a22=0; > > ************************************* > > There will appear 0/0. > > (and also big problem in p_value calculation). > > > > Don't you think this is a logical problem rather > than a numerical one? > - "Not defined" is a pretty good answer. > > How do *you* describe the correlation of (say) > height with weight of a set of objects, where > every object is exactly the same height? > > - well, there is no "co"- variation, so you might > settle for zero. But I think that depends on how > limited your needs are. . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
