Learning SAS by Example: A Programmer's Guide by Ron Cody

By Ron Cody

Learn how to application SAS by way of example!If you love studying via instance, then studying SAS by means of instance: A Programmer's advisor makes it effortless to benefit SAS programming. In an instructive and conversational tone, writer Ron Cody in actual fact explains every one programming method after which illustrates it with a number of real-life examples, via a close description of ways this system works. The textual content is split into 4 significant sections: Getting all started; info Step Processing; providing and Summarizing Your info; and complex subject matters. topics addressed include:Reading information from exterior sourcesLearning information of information step programmingSubsetting and mixing SAS info setsUnderstanding SAS capabilities and dealing with arraysCreating reviews with PROC file and PROC TABULATELearning to take advantage of the SAS Output supply SystemGetting begun with the SAS macro languageIntroducing PROC SQLYou can attempt your wisdom and hone your talents through fixing the issues on the finish of every bankruptcy. (Solutions to odd-numbered difficulties can be found behind this e-book. strategies to all difficulties can be found to teachers by way of vacationing Ron Cody's writer web page for details.) This ebook is meant for rookies and intermediate clients. Readers should still understand how to go into and put up a SAS application from their working system.

This ebook is a part of the SAS Press application.

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The order of these names matches the order of the values in the file. The dollar sign ($) following Gender tells SAS that Gender is a character variable. To see that this program works properly, let's add a PRINT procedure (PROC PRINT) step to list the observations in the SAS data set (details on PROC PRINT can be found in Chapter 14). Program 3-2 Adding PROC PRINT to list the observations in the data set title "Listing of data set DEMOGRAPHICS"; proc print data=demographics; run; Here is the output from PROC PRINT: Listing of data set DEMOGRAPHICS Obs Gender Age Height Weight 1 M 50 68 155 2 F 23 60 101 3 M 65 72 220 4 F 35 65 133 5 M 15 71 166 Each column represents a variable in the data set and each row represents the data on a single person (an observation).

SAS returns back to the top of the DATA step (the line following the DATA statement) and sees that there are more lines of data to read (when it executes the INPUT statement). It repeats the process of setting values in the PDV to missing, reading new data values, computing the BMI, and outputting observations to the SAS data set. This continues until the INPUT statement reads the end-of-file marker. You can think of a DATA step as a loop that continues until all data values have been read. At this time, you may find this discussion somewhat tedious.

The dollar sign following variable names tells SAS that values for Gender are character values. Without a dollar sign, SAS assumes values are numbers and should be stored as SAS numeric values. Finally, the DATA step ends with a RUN statement. You will see later that, depending on what platform you are running your SAS program, RUN statements are not always necessary. In Program 2-1 we placed a blank line between each step to make the program easier to read. Feel free to include blank lines whenever you wish to make the program more readable.

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