Example 7.39: Nelson-Aalen estimate of cumulative hazard

May 31, 2010
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Example 7.39: Nelson-Aalen estimate of cumulative hazard

In our previous example, we demonstrated how to calculate the Kaplan-Meier estimate of the survival function for time to event data. A related quantity is the Nelson-Aalen estimate of cumulative hazard. In addition to summarizing the hazard incurred ...
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Memorial Day — putting names to the numbers

May 29, 2010
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Contributed by Dr. Robert Allison, Research & Development, SAS Memorial Day is a U.S. federal holiday to commemorate the U.S. men and women who died while in military service. My SAS graphs are often about numbers and trends — but for...
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Convert data to CSV file

May 28, 2010
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In addition to the export file wizard and proc export (section 1.2.3 of SAS and R), SAS provides a the nifty little %ds2csv macro that can do this quickly and easily.  The advantages to this approach are that there are a few extra options and that...
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What Time Do They Roll Up the Sidewalks in Cary?

May 28, 2010
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When you travel as much as a typical SAS instructor, you get to be an expert on hotels, restaurants and entertainment. Anyone can figure out where to eat or what to do in downtown Chicago or in Manhattan, but it takes a dedicated traveler to show...
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Collaborative Writing: Creating a New Certification Exam

May 26, 2010
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I love a good collaborative project. Recently, I had the good fortune to work with a global team of Business Intelligence experts to create a new SAS certification exam for “BI Content Development”. Our team spanned 4 continents, worked in 6...
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Roundup

May 25, 2010
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Currently I'm ... Reading Recently finished Analytics at Work: Smarter Decisions, Better Results by Davenport, Harris, and Morison (2010, Harvard Business Press). I've assigned it as companion reading for the students who take the Advanced Busin...
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SAS/GRAPH "SG" Procedures–Not Just for Statisticians!

May 25, 2010
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If you are a SAS/GRAPH user, you may have heard about the new Statistical Graphics ("SG") procedures that are new in SAS 9.2. These procedures are designed to make it easier to produce common statistical charts and plots. You may have assum...
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New SAS/ETS, SAS/OR, and SAS/STAT Products Shipping

May 25, 2010
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Contributed by Maura Stokes, Director, Research & Development, SAS In order to get new analytical functionality to our customers faster than ever, SAS has released new versions of SAS/STAT®, SAS/ETS®, and SAS/OR® software. These pr...
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SAS Releases the Third Maintenance Release for SAS 9 .2

May 24, 2010
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Contributed by Marie Dexter, SAS SAS recently announced the availability of the third maintenance release for SAS 9.2. Maintenance releases are cumulative, so when you apply the third maintenance release, your software will be updated to the curre...
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