Monitor variables without model influence in SIMCA-online (Q914)
The information in this article applies to:
SIMCA 16
SIMCA 15
SIMCA 14.1
SIMCA 14
SIMCA 13.0.2
SIMCA 13
SIMCA-online 16.1
SIMCA-online 16
SIMCA-online 15.1
SIMCA-online 15
SIMCA-online 14
SIMCA-online 13.3
SIMCA-online 13.2
SIMCA-online 13.1
SIMCA-online 13
Summary:
To monitor a variable in SIMCA-online it needs to be either (A) part of the model or (B) part of a generated variable that is part of the model.
In case (B) you can exclude the variable and still monitor it in SIMCA-online. Case (A) is described in Workaround below.
Workaround:
To make an original variable lack influence on the model and predictions, both in SIMCA and in SIMCA-online, and still keep it in the model:
- Open the Workset and click the Scale tab.
- Mark the variable.
- In the Modifier field, enter 0 and click Set.
- Close the Workset dialog and make sure that you click No to not remove the modified variable that now lacks variance.
More Information:
Note that down weighting a variable using a very small weight in order to make it lack influence may result in unexpected behavior in the DModX plot in SIMCA-online. We therefore advise against that method.
See also https://umetrics.com/kb/monitoring-variables-excluded-evolution-models-simca-online.
Date modified: Mar 25, 2020
Article type:
Information