loops can and should be used, how to set up an ARRAY with and without specifying the number of array elements, and determine what type of DO loop is most
Iterative Do groups loop through a body of code until stopped by the control variable There are three types of Do groups that are Iterative: Index Variable, Do
Arrays are SAS data step statements that allow iterative processing of variables and text We will look at many examples, including 1) input and output of files using
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DO loop, DO UNTIL, DOW loop, ARRAY statement, DIM function, SET statement options INTRODUCTION Although most SAS DATA step programmers have
PharmaSUG AD
A SAS array is a collection of SAS variables that can be referenced in the Data of the ARRAY statement and the DO loop has enabled us to process a group of
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The explicit loop, which utilizes the iterative DO, DO WHILE, or DO UNTIL statements, is used to repetitively execute certain SAS® statements within each iteration
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Use an ARRAY and a DO loop in a new DATA step to count The following SAS code will “switch” the data to long format and store it as a temporary file
arrays
LOOPS and arrays We will assume you statements to be run by SAS • An END statement statement, after a condition, but with arrays this is not as common
simple arrays
loops as well as advanced constructs such as the DO-loop of Whitlock (DoW) of DO-loops in SAS beyond only using them for arrays as it begins with the
DoLoop
– Example of using -foreach- command in Stata • What are Macros? – Similarities and differences in using macros between SAS and Stata • Macro variables in
workshop Arrays and Macros in SAS and Stata
One way is to use SAS ARRAYs and DO loops. SAS ARRAYS. A SAS ARRAY is a set of variables of the same type that you want to perform the same operation on.
The solution to overcome the inefficiency is to use a SAS ARRAY with a subsequent DO loop. We will first define two different types of arrays the indexed array
Arrays are SAS data step statements that allow iterative processing of variables and text. We will look at many examples including 1) input and output of files
statement. Arrays are SAS DATA step statements that allow clever programmers to do a great deal of work with little code. Iterative inputting of text and
Although most SAS DATA step programmers have made use of DO loops and arrays few take full advantage of the power and flexibility of these tools.
https://support.sas.com/resources/papers/proceedings/pdfs/sgf2008/179-2008.pdf
The explicit loop which utilizes the iterative DO
How can a beginning SAS programmer write less SAS code for this type of data preparation that is also more efficient? One way is to use SAS ARRAYs and DO loops.
An array and a loop can make the program smaller. A SAS array is not a new data structure the array name is not a variable
If they do not exist within a program data vector (PDV) when the ARRAY statement is compiled SAS creates them for you. •. Variables that are not previously
Paper 158-2010 - How to Use ARRAYs and DO Loops