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Repetitive Execution - Part 2 (repeat and while Loops)In this video we introduce the repeat and while loops. There are small differences in the syntax of the three types of loops in R, which may make one form more convenient than another in any given…
From Daniel Hall
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Conditional Execution - Part 3 (The switch() Function).mp4The ifelse() function and if-else statements can be used to evaluate one of two expressions or chunks of code depending upon a Boolean logical condition. However, these constructions must be chained…
From Daniel Hall
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Conditional Execution - Part 2 (The if Statement).mp4Conditional execution is a fundamental technique in all computer programming and most computing languages have an if statement. The if and if else statements in R are similar to those in other…
From Daniel Hall
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PROC TRANSPOSE - Part 1 (Transposing Observations into Variables)Rearranging (or re-shaping) a data set can be done in several different ways in SAS. PROC TRANSPOSE is one important tool for such operations. Here we show how to use PROC TRANSPOSE to convert…
From Daniel Hall
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Introduction to the OUTPUT StatementSeveral SAS PROCs have an OUTPUT statement. But here we discuss the OUTPUT statement in a data step. It is used to write the current observation (the contents of the Program Data Vector) to a data…
From Daniel Hall
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