The DATASOURCE Procedure
- Overview
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Getting Started
Structure of a SAS Data Set Containing Time Series Data Reading Data Files Subsetting Input Data Files Controlling the Frequency of Data – The INTERVAL= Option Selecting Time Series Variables – The KEEP and DROP Statements Controlling the Time Range of Data – The RANGE Statement Reading in Data Files Containing Cross Sections Obtaining Descriptive Information on Cross Sections Subsetting a Data File Containing Cross Sections Renaming Time Series Variables Changing the Lengths of Numeric Variables -
Syntax
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Details
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Examples
BEA National Income and Product Accounts BLS Consumer Price Index Surveys BLS State and Area Employment, Hours, and Earnings Surveys DRI/McGraw-Hill Format CITIBASE Files DRI Data Delivery Service Database PC Format CITIBASE Database Quarterly COMPUSTAT Data Files Annual COMPUSTAT Data Files, V9.2 New Filetype CSAUC3 CRSP Daily NYSE/AMEX Combined Stocks
- References
| ATTRIBUTE Statement |
The ATTRIBUTE statement assigns formats, labels, and lengths to variables in the output data sets.
The variable-list can contain variable names and variable name range specifications. See Variable Lists for details. The attributes specified in the following attribute list apply to all variables in the variable list.
An attribute-list consists of one or more of the following options:
- FORMAT= format
associates a format with variables in variable-list. The format can be either a standard SAS format or a format defined with the FORMAT procedure. The default formats for variables depend on the file type.
- LABEL= "label"
assigns a label to the variables in the variable list. The default labels for variables depend on the file type. Labels can be up to 256 bytes in length.
- LENGTH= length
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specifies the number of bytes used to store the values of variables in the variable list. The default lengths for numeric variables depend on the file type. Usually default lengths are set to 5 bytes.
The length specification also controls the amount of memory that PROC DATASOURCE uses to hold variable values while processing the input data file. Thus, specifying a LENGTH= value smaller than the default will reduce both the disk space taken up by the output data sets and the amount of memory used by the PROC DATASOURCE step, at the cost of precision of output data values.