SAS^® data sets can be read into SAS/IML^® using the USE and READ statements and can be written from IML using the CREATE/USE and APPEND statements. The USE statement specifies which data set is the current data set. Once a data set has been identified with the USE statement, you can transfer its values into a matrix with the READ statement, or you can APPEND matrix values to the data set with the APPEND statement. If the data set to which you want to append values does not exist, you can create the data set with a CREATE statement and then use the APPEND statement to transfer the matrix values into the data set.

Specific information and alternative specifications for these tasks can be found in the Working with SAS Data Sets chapter of the SAS/IML User's Guide.

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