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How to Prepare for the SAS Certified Specialist Base Programming Exam
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Lesson 5: Common SAS Operators
IMPORTANT! We have recently updated our training materials. Check out the latest free training here. 


In this lesson, we will explain the basic SAS operators (+-*/) and some simple calculation functions.  

1.  SAS Operators - Summation, Subtraction, Multiplication and Division 

Example
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The dataset above contains the salaries for both Amy and John. We are going to add up the salary for each staff for the monthly pay cheque. Notice: Amy is missing the last week of work so that her salary in week 4 is missing.


Summation
There are two methods to add up a number:

Method 1: A = B + C (Not Recommended)
Method 2: A = sum (of B, C) (Recommended)

DATA SAL_4WEEK;

Set SALARY;

SALARY1 = WEEK1 + WEEK2 + WEEK3 + WEEK4;
SALARY2 = SUM (OF WEEK1, WEEK2, WEEK3, WEEK4);

RUN; 
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As you can see, the two summation methods return the different results when there is a missing field (See Amy's Salary 1 and 2). Salary1, using summation method 1, returns a missing result since the Week-4 salary is missing. In contrast, Salary2 simply skips the missing salary and add up the 3 non-missing salaries from week1 to week3.

Method 2 is more commonly used as any missing value is being taken care of in the function.


Subtraction, Multiplication and Division

Subtraction, multiplication and division are quite straightforward:

Example 
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The code below computes the BMI for each patients:

DATA BMI2;

Set BMI;

BMI = WEIGHT / (HEIGHT*HEIGHT);

RUN; 
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DONE! You have learned the basic operators in SAS! 
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  • Home
  • SASĀ® Certification Training
    • SAS Certified Specialist Exam Training Program
    • How to Prepare For SAS Certified Specialist Base Programming Exam
  • Online Courses
    • Practical SAS Training Course for Beginners
    • Proc SQL Course
    • SAS Project Training Course
    • Logistic Regression (Credit Scoring) Modeling using SAS
  • Articles
    • Get Started >
      • 18 Free Resources to Help You Learn SAS
      • SAS Tutorial
      • How to Install SAS Studio
      • How to Learn SAS Fast
    • Data Import >
      • Importing Excel Spreadsheet
      • Importing CSV Files
      • Importing Text Files
    • SAS Functions >
      • CAT, CATT, CATS, CATX Functions
      • If-Then-Else statement
      • TRIM Function
      • STRIP Function
      • YEAR, MONTH, DAY Functions
      • Compress Function
      • Do-Loop
      • SCAN Function
      • LIKE Operator
      • INDEX Function
    • Data Manipulations >
      • The Ultimate Guide to Proc SQL
      • Proc Datasets
      • Dictionary Tables
      • Dealing with Missing Values
      • Proc Compare
      • Proc Transpose
      • RETAIN Statement
      • SAS Formats
      • SAS Arrays
    • Statistical Analysis >
      • Proc Means
      • Proc Freq
      • Proc Tabulate
    • Machine Learning >
      • Predicting Fish Species Using K-nearest Neighbor in SAS
      • Classify Product Reviews on Amazon Using Naive Bayes Model in SAS
    • Informational Interviews >
      • How to get a Clinical Trial/Research job without experience
      • Senior Recruiter at a Fortune 500 Retail Company
      • Manager, Non-profit Health Services Research
      • HR Manager
      • Quantitative Analyst
  • Services
    • The Ultimate Job Search Automation Services
    • Statistical Consulting
    • SAS Project or Assignment Help
    • Data Import Services
    • Data Manipulation and Reporting Services
  • In-class Training
    • SAS Training for Job Seekers
  • Guest Lecture
  • Sample Resume
  • About us
  • Contact Us