259-29: Array tutorial(2) $ beginning intermediate;
These names cannot contain a blank or any special character except the underscore. Finally names cannot be SAS reserved words. Shorter way around - Example #1.
SAS Support - Using Arrays in SAS® Programming
Basic Array Example: Calculating Net Income . arrays are typically referred to as either character arrays or numeric arrays.
242-30: Arrays Made Easy: An Introduction to Arrays and Array
languages are that SAS array elements don't need to be contiguous the same length
Off and Running with Arrays in SAS®
In this example we will define a character array to concatenate the two-character State or Province code from the Location variable to the end of the Product
519-2013: Arrays - Data Step Efficiency
SAS arrays must contain either numeric or character data not a mixture of both. TEMPORARY ARRAY DEFINITION. Temporary arrays provide convenient tabular data
Paper 158-2010 - How to Use ARRAYs and DO Loops
An example of the data is given in Figure 1. Figure 1: Raw CES-D data. Hands-on Workshops. SAS Global Forum 2010
SAS Cloud Analytic Services: CASL Programmers Guide
???/???/???? characteristic that identifies a variable's value as a character string an integer
A Beginners Guide to Using ARRAYs and DO Loops
analysis the raw data needs to be manipulated in some way; for example new variables used to specify if the all elements in the array are character.
SAS ® ARRAYS: A BASIC TUTORIAL INTRODUCTION OVERVIEW
The examples are intentionally simple using SAS data sets with only a few ob- servations and a few variables
Loop-Do-Loop Around Arrays
Arrays are SAS data step statements that allow iterative processing of The following example loads character variables to the array and then uses a do ...
Using Arrays in SAS Programming - SAS Support
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
Using Arrays in SAS Programming
When an array is defined with the ARRAY statement SAS creates an array reference The array reference is in the following form: array-name{n} The value of n will be the element’s position within the array For example in the temperature array defined above the temperature for 1:00 PM is in the variable TEMP13
A Beginners Guide to ARRAYs and DO Loops
EXAMPLE OF AN INDEXED ARRAY Going back to the example of reversing the CES-D items the SAS code that would be required to define an indexed array containing the 4 CES-D items that need to be reversed is data cesd; set in cesd1; array aireverse {4} cesd4 cesd8 cesd12 cesd18 ; In defining this array we first specify the SAS keyword ARRAY with
A Beginner's Guide to Using ARRAYs and DO Loops
Example of An Indexed ARRAY Going back to the example of reversing the CES-D items the SAS code that would be used to define an indexed array containing the 4 CES-D items that need to be reversed is : data cesd; set in cesd1; array aireverse {4} cesd4 cesd8 cesd12 cesd18;
SUGI 29 Tutorials Paper 259-29 - SAS Support
Arrays are SAS data step statements that allow clever programmers to do a great deal of work with little code Arrays process identified variables as a group rather than individually therefore saving both machine and programmer time This paper should help lower the attendee's anxiety level when using arrays
Searches related to sas character array example filetype:pdf
the array ( A numeric constant/Numeric SAS expression /(*) [$] - used to specify if the elements in the array are character variables the default type is numeric [length] - used to define the length of new variables being created in the array optional array_elements - a list of variables of the same type (all numeric
How do I use arrays in SAS?
- Arrays simply provide an alternative method for referring to a variable rather than using the name of the variable. 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.
How does SAS determine the number of variables in a weight array?
- Notice the asterisk (*) inside the brackets in the WEIGHT array above. 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.
Can I put a variable name in a bracket in SAS?
- Note: SAS must be able determine the number of elements or variables in the array when it compiles the code. Therefore, you cannot place a variable name in the brackets, as illustrated in the following statement, with the intent of SAS referencing the name to determine the number of elements:
Which SAS statement computes the value of a variable OK?
- The SAS statement that computes the value of the variable OK needs a word of explanation. First, the logical comparison P EQ 0 returns a value of true or false, which is equivalent to a 1 or 0. This value is then assigned to the variable OK. Thus, the variable OK is set to 1 for all valid values of ANSWER and to 0 for any invalid values.
Data Management using SAS Arrays
- Lavanya Vangala 19 repetitive actions on a group of variables
9 computing new variables
9 reshaping data
When do we need Arrays?
2Repetitive action: An Example
We have been given a SAS data set where a value of 999 was entered whenever there was a missing numeric value. General coding Practice (Manual Recoding with If Then): data recode_data; set actual_data; if a =999 then a1=.; if b = 999 then a2=.; if c = 999 then a3=.; if d = 999 then a4=.; if e = 999 then a5=.; if f = 999 then a6=.; Run; 3What is An Array?
Array is similar to Vector/matrix notation in
Mathematics
Structure:
9Group of variables in a data step
9Elements must be of same data type
9No need of same length
9No need to be related
9Can be multi dimensional
4ARRAY Statement
ARRAY arrayname {n} [$] [length] array_elements;
ARRAY - is a SAS keyword that specifies that an array is being defined Arrayname - a valid SAS name that is not a variable name in the data set {n} - the index used to give the number of elements in the array ( A numeric constant/Numeric SAS expression /(*) [$] - used to specify if the elements in the array are character variables, the default type is numeric [length] - used to define the length of new variables being created in the array, optional array_elements - a list of variables of the same type (all numeric or all character) to be included in the array 5SAS DO Loops and Why?
9SAS Array provides a different way to reference a
group of variables9Reference to the Array elements can be done using
DO loops.
9DO loop should have a corresponding END statement
(Caution !)9within a single DO loop multiple arrays can be
referenced and operations on different arrays can be performed. 6Using Arrays ² Recoding variables
For Recoding hundreds of variables arrays are certainly helpful..- Note : Array elements do not need to be named consecutively data recode_data; set actual_data;Array recode(6) a b c d e f;
Do I = 1 to 6;
If recode(i) = 999 then recode(I) = .;
End;Drop I;
Run; 7Extension to All variables
data recode_data; set actual_data;Array numeric_recodes(*) _numeric_;
Array character_recodes(*) $ _character_;
Do _n_= 1 to dim(numeric_recodes);
If numeric_recodes(_n_) = 999 then numeric_recodes(_n_) = .; End;Do _n_= 1 to dim(character_recodes);
If character_recodes(_n_) = 'N/A' then character_recodes(_n_) = ''; End; Run; SAS also has a few code words to put all character and/or numeric variables into arrays for you. These can save a lot of typing and is useful for cleaning up missing values in your variables. Note: * - Is used when the number of elements in the array isn't known 8Assigning Initial values
9Initial values can be assigned to Array members
9Values must always be specified at the end of ARRAY
statement9Character values need to be in Quotes
Examples:
Array a {10} a1-a10 ( 5 5 5 5 5 5 5 5 5 5 );
Array a{10} (10*5);
Array new {4} $ test1 test4 Sci
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