GENERAL CONCEPTS OF BASE SAS PROGRAMMING.pptx

General description of base sas

1. INTRODUCTION BASE SAS

2. SAS Platforms

3. SAS STUDIO

4. Basically There 4 windows Explorer Window Code Window Log Window Result or OUTPUTDATA window. Explorer Window(Navigation Pane): For Searching Files, Folders and Libraries. Code Window(Editor Window):Writing the program code. Log Window: For checking the Execution Status of program. Result Window: Display the results. OutputData Window: Display the New dataset created .

5. SAS TABLE

6. Basically Table Divided into two parts: 1. Descriptor portion or Metadata. 2. Data Values. Vertical Columns- Variables. Horizontal Rows- Observations or Records . Variable name can have 1-32 characters. Should start with letter or underscore. Can be in lowercase or uppercase. Variables are of two types: Numeric: Numbers from 0 to 9,minus sign, decimal point, and scientific notation E. Character : Alphabets, numbers, Special Characters.

7. WORKING OF SAS SAS Program Run in Two Phases: Compilation Phase Execution Phase In Compilation Phase declarative statements are processed and syntax errors are identified . In compilation phase Data attributes and rules of execution are established. execution phase processes each statement sequentially and generates the output. Execution phase Read, Manipulate and Write the data

8. SAS PROGRAM

9. A SAS program can contain any combination of DATA steps and PROC steps . DATA and PROC steps get their name from the key word - DATA or Proc. Each step consists of series of statements . Each statement ends with semicolon . Most steps end with a run statement , and a few PROC steps and with a quit statement. DATA steps, usually retrieve and manipulate data, and PROC steps, analyze the data.

10. A DATA step might also filter rows, compute new columns, join tables, and perform other data manipulations. A PROC or procedure step processes a SAS table in a specific predefined way. SAS have Dozens of procedures that Generates Reports and Graphs, Manage Data and Performs complex statistical Analysis. Example: Proc print -Displays the data Proc Means - Perform Statistics Proc Report -Generates Reports Proc Chart, Proc Gchart , Proc Plot, Proc SGPLOT - Generate Graphs

11. Global Statements Global statements can be outside DATA and PROC steps, and they typically defined some option setting for the SAS session.

12. THANKS