The TSMODEL Procedure

You can include a BY statement with PROC TSMODEL to obtain separate processing for groups of observations that are defined by the BY variables. The rows in each distinct BY group are used to accumulate the time series vectors from the timestamped row data according to a desired frequency (which is specified in the INTERVAL= option) and the accumulation mode (which is specified in the ACCUMULATE= option).

For more information about table output and BY group processing, see the section Table Output.