I am using SAS 9.3.    I am interested in generating a dataset containing all possible permutations of 3 drugs in a block size of 6, with equal numbers of each trial (1:1:1).  That is, if the treatments are A, B, C and I have a block size of 6 with 2 As, 2 Bs and 2 Cs, then some possible blocks include the following:    AABBCC AACCBB ABACCB AABCCB etc.   The important thing is that I must have each treatment repeating twice and only twice per block. Because each treatment must be present twice in each block--this is usually where I have been running into problems with other code that i have tried.  I have unsucessfuly tried to generate this in IML and PROC PLAN (using the TREATMENTS statement).     I have tried to implement a process in IML, which is great, but it provides duplicates when I only want to see the unique permutations.  Here is that code:      proc iml; call randseed(1234); tName = "Treat1":"Treat6"; perms = allperm({A A B B C C});   Any help would be appreciated!      ... View more

I am trying to recreate an example in SAS from "Applied Multivariate STatistical Analysis" by Johnson and Wichern.  The example is 7.10, pg 400-401 of the 6th edition.   There are 2 predictors and 2 outcomes; we are predicitng a single point based on the fit of the regression model.  The problem comes when trying to actually plot the prediction and confidence ellipses centered about the specific predicted piont (therefore, we are not concrned with the overall ellipses for the means of the data, which SAS easily generates).   Does anyone have a any suggestions how to obtain such a plot?   Using SAS 9.3.   Thank you,      ... View more

Hello, I am trying to evaluate the correlation between two independent populations via PROC CORR and Fisher's z test.  Is it possible to evaluate these two correlations with proc corr (or some other procedure) without inputting an entire dataset and using just the coefficients and sample sizes? Thank you. ... View more