SAS Essentials: A Guide to Mastering SAS for Research

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By Alan C. Elliott

SAS Essentials offers an creation to SAS statistical software program, the prime statistical facts research device for medical study. via its straight forward method, the textual content offers SAS with step by step examples. With over fifteen years of educating SAS classes and over fifty mixed years of educating and consulting by way of the authors, this helpful reference offers info manipulation and statistical recommendations, together with an internet site with examples. This textbook is vital for academics as the chapters are self-contained and will be used for this reason to the teacher?s choice, no matter if for a one-semester or two-semesters direction.

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Three. desk 2. three. OBS c02. indd 26 identity A pattern SAS facts set SBP DBP GENDER AGE WT 1 1 one hundred twenty eighty M 15 a hundred and fifteen 2 2 a hundred thirty 70 F 25 a hundred and eighty three three one hundred forty a hundred M 89 a hundred and seventy four four a hundred and twenty eighty F 20 one hundred fifty five one zero five a hundred twenty five eighty F 20 a hundred and ten 10/15/09 4:21:22 PM Methods of interpreting info into SAS 27 observe that the columns of the knowledge set desk fit the variable names within the enter assertion. 6. The PROC PRINT assertion tells SAS to create a list of the information. We’ll examine extra approximately PROC PRINT within the part “Using PROC PRINT” in bankruptcy five. 7. The RUN assertion tells SAS to complete this element of this system. with no the RUN assertion, SAS may perhaps count on that extra directions are pending, and it'll no longer end the approach. accordingly, SAS courses needs to finish with a RUN assertion. the most universal blunders in writing a SAS application is to put out of your mind the RUN assertion. Don’t enable this occur to you! benefits of freeform record enter a number of the merits of freeform record enter are: ■ It’s effortless, with little or no to specify. ■ inflexible column positions usually are not required, making info access effortless. ■ in case you have a knowledge set within which the information are separated by means of blanks, this can be the fastest option to get your information into SAS. principles and regulations for freeform record enter the next ideas and regulations govern freeform record enter: ■ each variable on every one facts line has to be within the order laid out in the enter assertion. ■ information values needs to be separated via a minimum of one clean. (We’ll find out about info with different delimiters within the Going Deeper part “Using complicated INFILE assertion innovations” during this bankruptcy. ) ■ clean areas representing lacking variables aren't allowed. Having lacking values within the facts reasons values to be out of sync. If there are lacking values within the information, a dot (. ) might be positioned within the place of that variable within the facts line. (We’ll find out about different lacking price innovations within the part “Using IF to Assign lacking Values” in bankruptcy four. ) for instance, a knowledge line with AGE lacking may well learn: four a hundred and twenty eighty F . one hundred fifty ■ c02. indd 27 info values for personality variables are limited: ■ No embedded blanks are allowed in the info price for a personality box (e. g. , MR ED). ■ a personality box may have a greatest size of 8 characters. 10/15/09 4:21:23 PM 28 Getting information into SAS HANDS-ON instance during this instance you'll input information utilizing the freeform facts access procedure. 1. within the Editor window, open the dossier DFREEFORM. SAS. (The code was once proven above. ) Run this system. 2. detect that the output directory (shown right here) illustrates an identical details as in desk 2. three. Obs identification SBP DBP GENDER AGE WT 1 1 a hundred and twenty eighty M 15 one hundred fifteen 2 2 a hundred thirty 70 F 25 one hundred eighty three three one hundred forty a hundred M 89 one hundred seventy four four one hundred twenty eighty F 30 a hundred and fifty five five one hundred twenty five eighty F 20 one hundred ten This tells you that SAS has safely learn on your information and created a SAS information set that may now be used for extra research. interpreting info utilizing the Compact technique A moment model of freeform enter enables you to have a number of matters’ info on a unmarried line.

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