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Sian RobertsMarch 12, 2015 0

SAS Press is heading to ENAR 2015 Spring Meeting

Are you heading to the ENAR 2015 Spring Meeting in Miami this week? SAS author and Program Chair Mithat Gönen, of Memorial Sloan-Kettering Cancer Center, and Associate Chair Brisa Sánchez, of the University of Michigan School of Public Health have created an outstanding scientific program this year. The sessions cover

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Learn SAS

Rick WicklinMarch 9, 2015 0

Writing data in chunks: Does the chunk size matter?

I often blog about the usefulness of vectorization in the SAS/IML language. A one-sentence summary of vectorization is "execute a small number of statements that each analyze a lot of data." In general, for matrix languages (SAS/IML, MATLAB, R, ...) vectorization is more efficient than the alternative, which is to

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Learn SAS

Rick WicklinMarch 2, 2015 0

Avoid loops, avoid the APPLY function, vectorize!

Last week I received a message from SAS Technical Support saying that a customer's IML program was running slowly. Could I look at it to see whether it could be improved? What I discovered is a good reminder about the importance of vectorizing user-defined modules. The program in this blog

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