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Calculating distance between observations

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Calculating distance between observations

I have a set of, say 36 observations and wish to calculate the distance matrix for these observations.  Now I can do so with the use of a double do-loop, but this seems tedious (even though, for my purposes at this stage, computation time is negligible still).  I read that the "distance" operator can be used in this way:

delta = distance(matrix, "L2"); 

for, say, the Euclidian distance.  It seems like a nifty function, unfortunately on my SAS9.3 system, the log gives me an error saying "Invocation of unresolved module DISTANCE."

Anybody have an idea why this is? 

SAS Super FREQ
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Re: Calculating distance between observations

The DISTANCE function was introduced in SAS/IML 12.1, which was released as part of SAS 9.3M2 (the second maintenance releaase): See Support.sas.com

SAS Super FREQ
Posts: 3,233

Re: Calculating distance between observations

Of course, you can still write your own distance function by using the SAS/IML language, as shown in the following article:
How to compute the distance between observations in SAS - The DO Loop

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