More Useful Links

Systems Seminar Consultants, Inc. (SSC) publishes a free newsletter called The Missing Semicolon. Browse through back issues and sign up to receive future editions via e-mail. I found one interesting tip in a back issue (Winter 2003) of The Missing Semicolon, regarding how to create macro variables using PROC SQL. You can also read copies of some of SSC’s recent SAS presentations.

I was directed to the SSC website by the Unofficial SAS Weblog (which you all should be reading regularly — that’s an order!) As evidence of the high calibre of work done by the Unofficial SAS Weblog, they even mention me and GVSUG! How can you not like a website like that?

From the Unofficial SAS Weblog we find Coruscation, which has a series of SAS posts. And from Coruscation, we learn of Paul Dickman, biostatistician from Karolinska Institutet in Stockholm, Sweden, who has a long series of SAS tips, some statistical, some not. Some examples: using FIRST. and LAST. variables; working with SAS dates; and histograms using PROC CAPABILITY.

For those of you a little more statistically minded, Dale McLerran provides an example of how you can use PROC MIXED to do standard or paired t-tests. He expands on this example to show how if the data are correlated in time (example: you measure a lake for pollutants today, and then again tomorrow, expecting the level of pollutants to be similar, rather than independent of the previous day) to show how PROC MIXED can be used in this case as well to perform a serially correlated paired t-test.