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SHAPING DATA LONG TO WIDE: Transposing with Arrays (Cont’d) data cardsbyaccount_array_1; instructs SAS to create all N records Reshaping data wide to long using a data step | SAS Learning Modules There are several ways to reshape data. You can reshape the data using proc transpose or reshape the data in a data step. The following will illustrate how to reshape data from wide to long using the data step. I have a SAS dataset, with the following variables: ID, Var1_0, Var1_3, Var1_6, Var2_0, Var2_3, Var2_6, which can be read like this: Var1_0 is parameter 1 at time 0. Re: Array for transposing data from wide to long form Posted 02-11-2017 09:24 PM (1994 views) | In reply to simkinm2 Since the composite of the varnames is going to be a constant, then you can include this code, which calculates it just once: Why were three steps needed? PROC TRANSPOSE was designed to either make a long file wide, or a wide file long. That is, either put all of the variables on one record for each by variable, or create one record for every combination of the by variable, the id variable, any variables to be copied, and only one of the to-be-transposed var Prior to joining the SAS Irvine office in 1988, Jim was an instructor at Ventura College and a SAS programmer at The Medstat Group in Santa Barbara.
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It is not a data structure, and array-name is not a variable. An ARRAY statement defines an array. 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). 2019-03-09 2013-07-21 In the SAS code below, the COL# variables can be renamed to be Amount1, Amount2, Amount3 etc., by specifying prefix=Amount.
So we say: retain ntimes s1-s5; We can change the values, but SAS won’t automatically erase them. Explicit output Arrays in the SAS language are different from arrays in many other languages. A SAS array is simply a convenient way of temporarily identifying a group of variables.
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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. IF first.famid THEN DO; DO i = 96 to 98 ; afaminc( i ) = . ; END; END; For every first observation in an id-group the retained variables are reset. Otherwise you would keep values from one od-group to the next.
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of regular expressions and entity resolution within the SAS programming language for a wide array of everyday applications of unstructured data analyses. Re: Long to wide Array Posted 05-14-2014 12:14 PM (1321 views) | In reply to ballardw I will need it in heat map type of report eventually (if that possible in sas) but my knowledge of sas has not made it there yet. 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.
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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. In this example a number of variables
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; 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.
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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. PROC TRANSPOSE: Long-to-Wide.
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Syntax – PROC TRANSPOSE During each iteration, SAS uses the name of the array and the value of I to reference a specific element or variable in each array. During the first iteration, the SAS statement uses Rev1 and Exp1 and uses them to calculate the net income and assign that value to Net_Inc1. SAS starts with this statement: net_inc[i] = revenue[i] - exp[i]; 2018-05-07 represents a wide file that we want to make even wider.
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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. In this case it is significantly more efficient to use a PROC TRANSPOSE rather than an array method. – Reeza Apr 9 '17 at 20:18 2019-06-03 · You can use PROC TRANSPOSE or the SAS DATA step to convert the data from wide form to long form.
6 Apr 2021 For long-to-wide transposes, the ID variable(s) determine the structure of the columns in the transposed dataset. There will be one column for Method 1 : Reshape Long list variable dataset to wide list dataset using Proc that need to make present in vertical to a array; Step 3: output all array values 2 Feb 2020 For long-to-wide Continuous to Binary); Reshaping Data (Wide to Long/ Long to Wide). Example: Applying the same computation to many variables simultaneously. For each Transposing Long to Wide Datasets · proc transpose data = sashelp.shoes out = shoes_trans prefix = Amount name = Metric label = Metric_Description; var sales; The primary objective of a SAS programmer is often to perform a statistical analysis of some data. dealing with very large amounts of data and limited system resources.