The DATASOURCE ProcedureOverviewGetting StartedSyntaxDetailsExamplesReferencesGetting Started: DATASOURCE ProcedureSubsections:Structure of a SAS Data Set Containing Time Series DataReading Data FilesSubsetting Input Data FilesControlling the Frequency of Data: The INTERVAL= OptionSelecting Time Series Variables: The KEEP and DROP StatementsControlling the Time Range of Data: The RANGE StatementReading in Data Files Containing Cross SectionsObtaining Descriptive Information on Cross SectionsSubsetting a Data File Containing Cross SectionsRenaming Time Series VariablesChanging the Lengths of Numeric VariablesCopyright © SAS Institute Inc. All rights reserved.