Hechsp 001 Chapter 3

Chapter 3 Getting Familiar with SAS ® Data Sets

Section 3.1 SAS Data Libraries

Objectives ,[object Object],[object Object],[object Object]

SAS Vocabulary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SAS Data Libraries You need to reference SAS data sets in your programs. Typing the full path every time that you use or create a data set is inefficient and time-consuming. SAS enables you to give a nickname to the fully qualified pathname. You can have a nickname for every different folder that contains SAS data.

SAS Data Libraries For Windows, a SAS data library is simply a directory. Each different location that contains SAS files is called a SAS data library. Example: c:orkshopysasfiles This is the fully qualified pathname of the SAS data library.

SAS Data Libraries You can think of a SAS data library as a drawer in a filing cabinet and a SAS data set as one of the file folders in the drawer. FILES LIBRARIES

[object Object],Assigning a Libref libref

[object Object],[object Object],SAS Data Libraries When you start SAS, you automatically have access to a temporary SAS data library and a permanent SAS data library. Work Sasuser

SAS Data Libraries ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],SAS Data Libraries When you start SAS, you automatically have access to a temporary SAS data library and a permanent SAS data library. You can create and access your own permanent libraries such as the one you named ia. ia - permanent library Work Sasuser ia

Assigning a Libref ,[object Object],[object Object],LIBNAME libref ' physical address of file ' ; libname ia 'c:orkshopinsasrog1';

Assigning a Libref ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],LIBNAME libref ' physical address of file ' ;

Assigning a Libref ,[object Object],When you use the nickname, SAS knows where to look for the SAS data sets. Work Sasuser ia

[object Object],Making the Connection 'c:orkshopinsasrog1'

Assigning a Libref ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],Making the Connection

[object Object],Making the Connection libname college 'C:ollegeData'; libname trip 'C:xtraCurricularenior Trip';

[object Object],Two-level SAS Filenames Every SAS file has a two-level name: libref . filename The data set ia . sales is a SAS file in the ia library. ,[object Object],Sasuser Work ia sales

Temporary SAS Filename ,[object Object],[object Object],work.employee employee

Temporary SAS Filename ,[object Object],[object Object],[object Object]

[object Object],Browsing a SAS Data Library PROC CONTENTS DATA= libref.SAS-data-set-name ; RUN; This enables you to see the descriptor portion of the crew data set in the International Airlines library. proc contents data=ia.crew; run;

PROC CONTENTS Output – Part 1 The SAS System The CONTENTS Procedure Data Set Name IA.CREW Observations 69 Member Type DATA Variables 8 Engine V9 Indexes 0 Created Friday, June 29, Observation Length 120 2001 03:15:27 PM Last Modified Friday, June 29, Deleted Observations 0 2001 03:41:07 PM Protection Compressed NO Data Set Type Sorted NO Label Data Representation WINDOWS_32 Encoding Default Partial PROC CONTENTS Output continued...

PROC CONTENTS Output – Part 2 Engine/Host Dependent Information Data Set Page Size 12288 Number of Data Set Pages 1 First Data Page 1 Max Obs per Page 102 Obs in First Data Page 69 Number of Data Set Repairs 0 File Name C:orkshopinsasprog1rew.sas7bdat Release Created 8.0202M0 Host Created WIN_PRO Partial PROC CONTENTS Output continued...

PROC CONTENTS Output – Part 3 Alphabetic List of Variables and Attributes # Variable Type Len Format Informat 6 EmpID Char 6 3 FirstName Char 32 1 HireDate Num 8 DATE9. DATE9. 7 JobCode Char 6 2 LastName Char 32 4 Location Char 16 5 Phone Char 8 8 Salary Num 8 Partial PROC CONTENTS Output

[object Object],[object Object],Browsing a SAS Data Library PROC CONTENTS DATA= libref ._ALL_ ; RUN; proc contents data=ia._all_; run;

[object Object],[object Object],Browsing a SAS Data Library

[object Object],[object Object],Browsing a SAS Data Library PROC CONTENTS DATA= libref ._ALL_ NODS ; RUN; The NODS option can only be used with the keyword _ALL_ . Remember

Browsing a SAS Data Library ,[object Object],PROC CONTENTS DATA= libref ._ALL_ NODS ; RUN; proc contents data=ia._all_ nods; run; There is a space between the _ALL_ and NODS options. Remember

PROC CONTENTS Output Partial PROC CONTENTS Output The SAS System The CONTENTS Procedure Directory Libref IA Engine V9 Physical Name C:orkshopinsasrog1 File Name C:orkshopinsasrog1 Member File # Name Type Size Last Modified 1 ALLGOALS DATA 5120 31Jul01:08:52:34 2 ALLGOALS2 DATA 5120 31Jul01:08:52:38 3 ALLSALES DATA 5120 31Jul01:08:53:28 4 ALLSALES2 DATA 5120 31Jul01:08:53:46 5 APRTARGET DATA 17408 13Aug01:08:41:42 6 CHICAGO DATA 17408 31Jul01:08:54:38

[object Object],Exercise – Section 3.1

Section 3.2 Exploring Your SAS Environment

[object Object],Exercise – Section 3.2

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