December 2014
Intermediate to advanced
858 pages
40h 10m
English
Content preview from SAS Certification Prep Guide, 4th Edition
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Executing Only Necessary Statements
Overview
When you execute
the minimum number of statements in the most efficient order, you
minimize the hardware resources that SAS uses. The resources that
are affected include disk usage, memory usage, and CPU usage.
Here are two techniques
to keep in mind:
-
Subset your data as soon as is logically possible.
-
Process your data conditionally by using the most appropriate technique.
Positioning of the Subsetting IF Statement
To
subset your data based on a newly derived or computed variable, use
the subsetting IF statement in a DATA step in order to process only
those observations that meet a specified condition.
The subsetting IF statement causes the DATA step to continue processing only ...
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.