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This also shows how to set libraries in SAS.Link to datasets: h 1 SAS #SASGF ® GLOBAL FORUM 2020 Paper 4419-2020 A Beginner’s Guide to Using ARRAYs and DO Loops Jennifer L. Waller, Augusta University, Augusta, GA ABSTRACT If you are copying and pasting code over and over to perform the same operation on This tutorial explains how to reshape data by converting multiple variables from long format to wide format. This tutorial explores 'Double Transpose' SAS method which is used to transpose multiple variables. It's a very handy technique to solve this challenge. Otherwise, it would be a very time consuming task. Arrays in SAS is a temporary grouping of SAS variables that are arranged in a particular order which are identified by an array name. Also read: How to sort an array in SAS? Arrays exist only for the session of the current data step and are referenced by the array name and subscript.
The syntax for an indexed array is as follows: ARRAY arrayname {n} [$] [length] list_of_array_elements; where 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. 2014-09-21 · 3 proc transpose in SAS for long and wide format conversion data samp; input row subject $ treatment $ pc20; cards; 1 1 R1 3.23515672 2 1 R2 4.14426184 3 1 R3 5.85422186 4 1 T 4.40670538 5 2 R1 -0.04801373 6 2 R2 3.47731900 7 2 R3 2.88554550 8 2 T 2.44074469 Arrays in SAS are very different from arrays in other programming languages. In other languages, arrays are used to reference multiple locations in memory where values are stored. In SAS, arrays may be used for this purpose (temporary arrays), but they also may be used to refer to lists of variables (the most common use of arrays in SAS). Learn how to make a long format dataset into a wide dataset.Link to the dataset: http://bit.ly/2EQkJzMThis is part of Statistics 321 at Virginia Commonwealt • There are two types of data structure: wide and long. The wide format means one-record-per- person, and the long format means multiple-record-per-person.
Re: Long to wide Array. It doesn't work because an array index, the part between the {}, can't be a character.
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using arrays and without the num variable from code we could try. data want; set have; by studyid; retain s01-s06; array s(*) s01-s06; if first.studyid then call missing(of s(*)); if first.studyid then i=1; else i+1; s(i)=value; if last.studyid; run; ARRAY afaminc(96:98) faminc96 - faminc98 ; Just an array, so you can call the variables by number instead of name.
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• Stata has a built-in command called “reshape” to change the data structure, but SAS needs to use array to do so.
You need to figure out a way to convert usage_type into a number that corresponds to variable location in the array. In reshaping the data from long to wide, we will create six new variables: faminc96, faminc97, faminc98, spend96, spend97 and spend98. The six variables are listed on both the keep and the retain statements. Following the same logic as in the previous example, we include an array statement to define the variables spend96, spend97 and spend98. 2. Transposing with Arrays proc means data=test_firstlast1 noprint missing; var total_count; output out=max_obs (drop=_FREQ_ _TYPE_) max=max_total_count run; data _null_ set max_obs; call symput (‘N’ ,Trim(Left(max_total_count))); run; 17 Call symput adds leading blanks to …
Re: Convert from Long to Wide. Posted 06-12-2017 12:10 AM (4021 views) | In reply to Jagadishkatam.
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This solution depends on you knowing the structure of the data, at which point you may as well type out the new dataset.
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Guelph SAS – USING ARRAYS – A FIRST EXAMPLE 2/18/2009 2:26:00 PM Page 1 Often it is necessary to perform a similar operation on several variables within an observation. Arrays are used in the SAS data step to reduce the amount of code that has to be written to accomplish these types of tasks.
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You need to figure out a way to convert usage_type into a number that corresponds to variable location in the array. In reshaping the data from long to wide, we will create six new variables: faminc96, faminc97, faminc98, spend96, spend97 and spend98. The six variables are listed on both the keep and the retain statements.
When the data are in the long format, you use a single SERIES statement and the GROUP=VarName option to plot the three groups of lines. 1. Transposing one group of variables. For a data set in wide format such as the one below, we can reshape it into long format using proc transpose.From the first output of proc print, we see that the data now is in long format except that we don’t have a numeric variable indicating year; instead; we have a character variable that has information on year in it.