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Frequently Asked Questions about SAS Software

The following Question & Answer List is based on SAS questions received by the author.

Processing Data Values

Question Answer
I have a table created by PROC LOGISTIC that includes a formatted numeric value of ">999.999" (using format ODDSR8.3), which is not selected when I use the following code:
IF uppadj > 999.999;
The unformatted value is "I". What is this?
The "I" value is an example of a special missing value. The actual value is .I , in this case used to indicate an infinite value. The special missing values are sorted in the following order: ._ , . , .A , .B ,..., .Z , then negative numbers, zero and, finally, positive numbers. Therefore, your code should be re-written as:
IF uppadj > 999.999 OR uppadj = .I;

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