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| The ESM Procedure |
Details: ESM Procedure
The ESM procedure can be used to forecast time series data as well as transactional data. If the data is transactional, then the procedure must first accumulate the data into a time series before it can be forecast. The procedure uses the following sequential steps to produce forecasts, with the options that control the step listed to the right:
Step |
Operation |
Option |
Statement |
|---|---|---|---|
1 |
accumulation |
ACCUMULATE= |
ID |
2 |
missing value interpretation |
SETMISSING= |
ID, FORECAST |
3 |
transformations |
TRANSFORM= |
FORECAST |
4 |
parameter estimation |
MODEL= |
FORECAST |
5 |
forecasting |
MODEL=, LEAD= |
FORECAST, PROC ESM |
6 |
inverse transformation |
TRANSFORM, MEDIAN |
FORECAST |
7 |
summation of forecasts |
LEAD=, STARTSUM= |
PROC ESM |
Each of the steps shown in Table 13.2 is described in the following sections.
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Copyright © 2008 by SAS Institute Inc., Cary, NC, USA. All rights reserved.