A man called Bloom and my take on him

September 28, 2011
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Wondering about Bloom and what he has to do with SAS programming.  For any learner, he is someone to respect. For anyone wishing to learn more about the levels of the learning process, this is the master. Bloom classified cognitive, a big word for thi...
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Jumping into Windows 7 Jump Lists

September 28, 2011
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Jumping into Windows 7 Jump Lists

Filed under "Little changes that you probably didn't notice". When Microsoft introduced Windows 7 to the desktop, one of the many usability features that they added were "Jump Lists". Jump Lists serve as a sort of shortcut to not just open an application, but "jump right in" to a particular
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Stored Process: How do I get to the Library? Libname Errors!

September 28, 2011
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Eeeeek!!! Your stored process failed.  It worked when in EG – how could this disaster have happened?  If you check the log, you may see an error similar to the following about the Libname not being assigned.  The library where you stored the data, in this case, MYLIB was either available to SAS EG...
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What is the chance that a random matrix is singular?

September 28, 2011
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A few sharp-eyed readers questioned the validity of a technique that I used to demonstrate two ways to solve linear systems of equations. I generated a random n x n matrix and then proceeded to invert it, seemingly without worrying about whether the matrix even has an inverse! I responded to the
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Example 9.7: New stuff in SAS 9.3– Frailty models

September 27, 2011
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Example 9.7: New stuff in SAS 9.3– Frailty models

Shared frailty models are a way of allowing correlated observations into proportional hazards models. Briefly, instead of l_i(t) = l_0(t)e^(x_iB), we allow l_ij(t) = l_0(t)e^(x_ijB + g_i), where observations j are in clusters i, g_i is typically norma...
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Example 9.7: New stuff in SAS 9.3– Frailty models

September 27, 2011
By
Example 9.7: New stuff in SAS 9.3– Frailty models

Shared frailty models are a way of allowing correlated observations into proportional hazards models. Briefly, instead of l_i(t) = l_0(t)e^(x_iB), we allow l_ij(t) = l_0(t)e^(x_ijB + g_i), where observations j are in clusters i, g_i is typically norma...
Read more »

Example 9.7: New stuff in SAS 9.3– Frailty models

September 27, 2011
By
Example 9.7: New stuff in SAS 9.3– Frailty models

Shared frailty models are a way of allowing correlated observations into proportional hazards models. Briefly, instead of l_i(t) = l_0(t)e^(x_iB), we allow l_ij(t) = l_0(t)e^(x_ijB + g_i), where observations j are in clusters i, g_i is typically norma...
Read more »

A math puzzle: 5-digit squares with certain properties

September 27, 2011
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I was intrigued by a math puzzle posted to the SAS Discussion Forum (from New Scientist magazine). The problem is repeated below, but I have added numbers in brackets because I am going to comment on each clue: I have written down three different 5-digit perfect squares, which
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Web Report Studio: Who stole my pie (chart)?

September 27, 2011
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Ok – I”ll just say it.  I hate pie charts.  If there are more than a few categories – then the user has to interpret the ranking order, it slows them down, and they may loose interest in the report that you so lovingly prepared.  Maybe you say – “Tricia, add the numbers! Geez – you’re...
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