SAS X
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The document provides an overview of using the X command in SAS to run operating system commands, utility commands, and higher-level programs from within SAS. The X command allows SAS programs to execute external commands, utilities like PKZIP, and conditionally create and run other SAS programs. Examples demonstrate using the X command to erase files, compress SAS data sets with PKZIP, and create a C/C++ program to fax reports from SAS.
SAS X
- 1. Command Line Functionality in SAS An overview of the “X” Command By Paul McDonald
- 2. Trademarks and Copyright Notices The SAS Software System and other references to SAS products are trademarks of the SAS Institute, Cary, North Carolina. PKZIP and PKUNZIP are products of PKWARE Inc., Brown Deer, Wisconsin Lawyer Talk!
- 3. Introduction This may come as a shock to you… Not every task the SAS Programmer will complete is suited for the SAS Software System. Possible Tools: A) BASE SAS B) COBOL C) Running Shoes
- 4. The X Command SYNTAX: X <'command'> ; Three examples of using the ‘X’ command Operating system commands Utility commands Higher-level executions
- 5. Operating System Commands COPY, ERASE, PRINT, MOVE, and such commands. EXAMPLES Erase a File “ Wild card characters” Conditional name
- 6. EXAMPLE: Erase a File C:\> ERASE C:\TEMP\MYFILE.TXT X ‘ERASE C:\TEMP\MYFILE.TXT’ ;
- 7. EXAMPLE: “Wild Card Character” C:\> ERASE C:\TEMP\*.TXT X ‘ERASE C:\TEMP\*.TXT’ ;
- 8. EXAMPLE: Conditional Names C:\> ERASE C:\TEMP\MYFILE.TXT %LET FILENAME = MYFILE.TXT X “ERASE C:\TEMP\&FILENAME” ; Double-Quotes
- 9. Utility Commands Use PKZIP and PKUNZIP inside a program to compress space of a SAS dataset or other file. TEXAS Rhode Island PK Ware
- 10. PKZIP Example Also use with PROC DBLOAD or when creating a large file. For regular FLATFILES, consider using the PIPE= option LIBNAME OUTPUT ‘C:\TEMP’ ; DATA OUTPUT.BIGDATA (COMPRESS=YES) ; /* SAS STATEMENTS */ RUN ; X ‘PKZIP A:\ZIPPED C:\TEMP\BIGDATA.SD2’ ;
- 11. Create and Run other programs “ Using SAS to Create and Run SAS” (Joseph M. Filip, Proceedings , Mid-West SAS Users Group 8th Annual Conference, 1997) Create and run other programs Simple CList, REXX, or *.CMD routines Conditinal C or C++ programs Conditional COBOL programs (UGH!)
- 12. A twist on the Aforementioned Paper “ Using SAS to Create and Run SAS” uses the %INCLUDE statement Suppose you want to conditionally create and run many programs—then you may want to use the X command Allow several different programs to run concurrently. If the system can handle it, this may be a good option.
- 13. EXAMPLE: Sir Fax-A-Lot 500 clients at different locations Each client is to get a one-page report every day PLAN A: Make an intern do it PLAN B: Fax the results directly to each recipient from SAS
- 14. EXAMPLE: Sir Fax-A-Lot C/C++ Routine
- 15. Other considerations SAS Options XWAIT|NOXWAIT XSYNC|NOXSYNC UNIX|CMS|TSO commands
- 16. SAS Options XWAIT|NOXWAIT XWAIT-- specifies that you have to type EXIT to return to SAS session NOXWAIT-- Windows shell goes away without your typing EXIT The XWAIT option affects the shell started by any of the following: X statement (X command, CALL SYSTEM) %SYSEXEC statement
- 17. SAS Options XSYNC|NOXSYNC XSYNC-- synchronous execution NOXSYNC-- asynchronous execution The value of this option affects the execution of the following: X statement (X command, CALL SYSTEM routine) %SYSEXEC statement
- 18. CMS|UNIX|VMS Commands Left-over from previous versions of SAS Work just like the X Command except they are ignored outside the respective operating system Normally it is best to use the X command rather than the CMS|UNIX|VMS commands.
- 19. Conclusion The X command is a versatile system function for the SAS Software System. can do the following run basic commands, run utility packages kick off separate SAS sessions Use the X command more and make your programs more robust
- 20. References, Sources Cited, and Credits Filip, Joseph M, “Using SAS to Create and Run SAS,” Proceedings , 8th Annual Conference of the Mid-West SAS Users Group, 1997, page 147-148 Certain text selected from SAS HELP Session, SAS v 6.12 for Windows 95 Special Thanks to PKWARE in Brown Deer, Wisconsin!
- 21. About the Author SPIKEware, Inc. 115 ½ West Main Street West Dundee, IL 60118 Phone (847) 428-6250 Fax (847) 428-6270 SPIKEware, Inc. is a consulting firm dedicated to helping other people solve their problems through technology. We specialize in providing solutions for our customers through the SAS Software System. http://www. SPIKEware .com/ Paul D. McDonald is the CEO of SPIKEware, Inc. and has been a SAS programmer since 1993. Paul has an A.A. in Electrical Engineering from Cloud County Community College, a B.A. in Physics from Southwestern College, and an M.B.A. in Finance from Keller Graduate School of Management. Paul can be reached by e-mail at PDM@ SPIKEware .com