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Learn SAS

Rick WicklinJuly 29, 2013 0

Read data sets that are specified by an array of names

One of my favorite features of SAS/IML 12.1 (released with 9.3m2) is that the USE and CLOSE statements support reading data set names that are specified in a SAS/IML matrix. The IMLPlus language in SAS/IML Studio has supported this syntax since the early 2000s, so I am pleased that this

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Learn SAS

Rick WicklinJuly 22, 2013 0

The inverse CDF method for simulating from a distribution

There are many techniques for generating random variates from a specified probability distribution such as the normal, exponential, or gamma distribution. However, one technique stands out because of its generality and simplicity: the inverse CDF sampling technique. If you know the cumulative distribution function (CDF) of a probability distribution, then

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Learn SAS

Rick WicklinJuly 15, 2013 0

Bin observations by using custom cut points and unevenly spaced bins

It is often useful to partition observations for a continuous variable into a small number of intervals, called bins. This familiar process occurs every time that you create a histogram, such as the one on the left. In SAS you can create this histogram by calling the UNIVARIATE procedure. Optionally,

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