GUI for SAS
SAS Studio provide following Windows for better Programming purpose:
- Code /Editor Window: Used to write and Edit codes. Enhanced Editor in SAS EG is syntax sensitive and allow you to collapse and expand the various steps in the program
- Server Files and Folders: Show the Physical Storage Locations of Data
- Log Window: Information about the execution of a program and lists the errors, warning or notes associated with the program.
- Result Window: Displays the output of program, it display each part of our results in a outline form.
In SAS EG, we have two more windows:
- Project Designer: It show the Process Flow of a Project in Flow charts
- Project Explorer: It show the Process Flow of a Project as Drop Down Menu
- Output Window: If program generates any printable results, they will appear in this window.
Click the Run button to execute the SAS program.
SAS Log Contains following information:
- Version of SAS and SAS site number
- SAS Statements with line number added on that left
- DATA Step is followed by name of the dataset and number of observation and variables.
- It says about computer recourses used for DATA and PROC Steps.
Layout of a SAS Program
We don’t have any specific rules for SAS statements.
- SAS Statements can be in upper or lower case.
- Statements can continue on next line
- Statements can be on same line as other statement
- Statements can start in any column
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To insert comments in your SAS program, we have two styles of comment:
- Start with asterisk (*) and end with semicolon (;).
- Start with slash asterisk (/*) and end with asterisk slash (*/).
How SAS execute DATA Step?
Data steps execute line-by-line and observation-by-observation.
This means SAS take first observation and run it through the all DATA step line by line before taking the second observation. SAS execute only one observation at time.
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