WebApr 10, 2024 · SAS iteration through table. I have two tables. The first table contains columns for student: ID, first_name, last_name, book. The second table contains columns for book: title and availability. I need to randomly assign a book title from the second table to each student in the first table. The number of books is limited and specified in the ... WebWhen SAS dataset has got sorted by some variables then at the time datastep execution SAS creates two automatic variables called FIRST. and LAST. For example lets consider the example of ready made dataset CARS available in SASHELP library. From PROC CONTENTS of this dataset we can get the information that this dataset is already sorted …
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WebTo have SAS create FIRST. and LAST. automatic variables you need to use a BY statement. If you want the new variable to be coded 1/0 then no need for the IF statement, just assign the automatic variable to a new permanent variable. To make one variable that is 1 for the first and the last then just use an OR. WebThen when the code executes, SAS creates temporary numeric variables first.var1, last.var1; first.var2, last.var2. These variables have 0/1 values for false/true, and indicate if the current row is the first or last row being input into a DATA or PROC step from the BY-group defined by the specified variable. The relevant 9.4 documentation is at: registar sportskih organizacija crne gore
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WebFeb 27, 2015 · To use BY processing you need to: SORT the data BY the variables of interest. SET the data BY the variables of interest. Then you can reference the FIRST. and LAST. flags. Let's assume that you want records with more than one value of NAME for the same values of ADDRESS and ZIP. WebApr 18, 2024 · What I found helpful in understanding First and Last with multiple BY variables was to create variables that hold the values and compare them to the data. Something like: DATA WORK.MFGTOT; SET WORK.MFG; BY YR WK PO; Firstyr = … WebFIRST. and LAST. If you use a by statement along with a set statement in a data step then SAS creates two automatic variables, FIRST.variable and LAST.variable, where variable is the name of the by variable. FIRST.variable has a value 1 for the first observation in the … dz u 2021 poz. 1485