sas retain array

PDF	SAS Support - Using Arrays in SAS® Programming When elements are initialized within an ARRAY statement the values are automatically retained from one iteration of the. DATA step to another; a RETAIN

PDF	Effective Use of RETAIN Statement in SAS® Programming The RETAIN statement allows values to be kept across observations enabling complex data manipulation. variables or members of an array.

PDF	244-2011: The Many Ways to Effectively Utilize Array Processing At the beginning of the second iteration since data is read from an existing SAS dataset

PDF	Arrays from A to Z SAS arrays can be used for simple repetitive tasks reshaping data Array names can be used in RETAIN statements

PDF	RETAIN or NOT? Is LAG Far Behind? The SAS® documentation has devoted a significant section to the RETAIN statement explaining many This is a list of variables NOT comprising an array.

PDF	1 LOCF-Different Approaches Same Results Using LAG Function This paper introduces SAS® syntax to accomplish LOCF and demonstrates the use of RETAIN statement

PDF	082-2013: Sharpening Your Skills in Reshaping Data: PROC A common data managing task for SAS® programmers is transposing data. is important to retain the array TEST in the DATA step; otherwise ...

PDF	Advance Array Processing Techniques: Ingenious uses of Array for + Programmer Analyst in PPD. + Previously worked in a local bank as a SAS programmer for. Marketing Analytics. + Attended a 3-month SAS Bootcamp Training

PDF	Transforming SAS® Data Sets Using Arrays ARRAY statement). The values of retained variables are not set to a missing value for each iteration of the Data Step as are the values of non- retained

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Using Arrays in SAS Programming - SAS Support

Basic Syntax of the ARRAY Statement To use arrays in SAS code first make sure that you understand the basic syntax of the SAS ARRAY statement This section describes the ARRAY statement and provides a number of examples to illustrate its use Subsequent sections progress to more complex statements and examples

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091-2011: Ready Set Retain and then Maybe Reset - SAS

SAS ARRAY is a set of variables of the same type called “elements” of the arry that you want to perform the same operation on An array name is assigned to the set of variables Then the array name is reference in other DATA step programming to do an operation on the entire set of variables in the array

PDF	The RETAIN Statement - SAS The RETAIN statement is often a mystery to beginning SAS programmers To understand how the RETAIN statement works you must first understand the basic operation of the SAS DATA step Program 1-1 demonstrates a SAS DATA step where a RETAIN statement is not used 1

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091-2011: Ready Set Retain and then Maybe Reset - SAS Support

The RETAIN statement is one method that SAS® programmers commonly use for making comparisons across observations One source of misunderstanding around the RETAIN statement centers around how long a value is retained and the ability or need to reset retained variables in many circumstances

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Data Management using Arrays - SAS

SAS DO Loops and Why? SAS Array provides a different way to reference a group of variables Reference to the Array elements can be done using DO loops DO loop should have a corresponding END statement (Caution !) within a single DO loop multiple arrays can be referenced and operations on different arrays can be performed 6

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the order of variables in a SAS dataset to meet external requirements • In summary the RETAIN statement can be used in novel ways to circumvent problems that commonly arise in the process of programming REFERENCES Gorrell Paul “The RETAIN Statement: One Window into the SAS Data Step"

What types of variables are automatically retained in SAS?

In contrast, there are several types of variables that are automatically retained. These include temporary array variables (variables from arrays named _TEMPORARY_), automatic variables (e.g., _N_, _ERROR_) and SAS data set variables (variables read from a SAS data set using SET, MERGE, UPDATE, and MODIFY).

What are the different types of arrays in SAS?

There are two types of arrays that can be specified in SAS. The first is what I call an indexed array and the second is a non-indexed array. All arrays are set up and accessed only within a DATA step. The syntax for an indexed array is as follows: ARRAY arrayname {n} ] [length] list_of_array_elements;

How does SAS determine the number of variables in an array?

SAS must be able to determine the number of elements or variables in the array when it compiles the code. SAS determines this either by using the constant value that is specified in the brackets or by counting the number of variables in the variable list. When you want SAS to use the variable list, place an asterisk in the brackets.

What is the purpose of a retain statement?

ASSIGN INITIAL VALUES The RETAIN statement could be used to initialize values for individual variables, a list of variables, or members of an array. If a value appears in a RETAIN statement, variables that appear before it in the list are initially set to that value.

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PDF	Using Arrays in SAS Programming - SAS Support Using Arrays in SAS® Programming Values within the array elements are retained automatically between the iterations of the DATA step – there is no need to use a RETAIN statement Values within the array elements are never written to the output data set

PDF	244-2011: The Many Ways to Effectively Utilize Array - SAS Support At the beginning of the second iteration, since data is read from an existing SAS dataset, the value in the PDV for the ID variable is retained from the previous

PDF	242-30: Arrays Made Easy: An Introduction to Arrays - SAS Support Once the basics of array processing are understood arrays are a simple solution The values for the temporary data elements are automatically retained across

PDF	Data Management using Arrays - SAS All variables that have been initialized will be retained 9 Page 10 Referencing Array Members To refer an array member

PDF	SUGI 24: Transforming SAS(r) Data Sets Using Arrays - SAS Support ARRAY statement) The values of retained variables are not set to a missing value for each iteration of the Data Step as are the values of non- retained variables

PDF	SUGI 27: Off and Running with Arrays in SAS(r) - SAS Support - Initial Values – can be included to give the elements of the array initial values This also causes these variables to be retained during the data step (i e not

PDF	Loop-Do-Loop Around Arrays - LexJansen Arrays are SAS data step statements that allow iterative processing of If the array is initialized, all the variables are retained (even if only some are initialized)

PDF	RETAIN or NOT? Is LAG Far Behind? - LexJansen The SAS® documentation has devoted a significant section to the RETAIN statement explaining many finer This is a list of variables NOT comprising an array

PDF	Effective Use of RETAIN Statement in SAS® Programming The RETAIN statement allows values to be kept across observations enabling complex data manipulation In SAS variables, or members of an array If a value