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Rick WicklinDecember 9, 2013 0

Interpreting PROC IML error messages: Matrices do not conform to the operation

When learning a new language, it is important to learn to interpret error messages that come from the language's parser or compiler. Three years ago I blogged about how to interpret SAS/IML error messages. However, many questions have been posted to the SAS/IML Support Community that indicate that some people

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Learn SAS

Catherine (Cat) TruxilloDecember 2, 2013 0

Two Ways to Handle Baselines in Catnip-Crazed Kitties

“Dear Cat, In a repeated measures drug study, I am unsure what to do with the baseline measurement. Since it is one of the time points in my study, I feel like I should use it as one of the dependent variable measurements. But I have seen analyses where baseline

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Learn SAS

Rick WicklinDecember 2, 2013 0

Write a matrix in the "long form"

If you write an n x p matrix from PROC IML to a SAS data set, you'll get a data set with n rows and p columns. For some applications, it is more convenient to write the matrix in a "long format" with np observations and three columns. The first

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