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In JMP, how to adjust the encoding of categorical variables in a regression model?

lyz6

Community Member

Joined:

Jun 22, 2016

In JMP, how to adjust the encoding of categorical variables in a regression model?

4 REPLIES
Peter_Bartell

Joined:

Jun 5, 2014

lyz6: Can you perhaps provide an example of what you mean by adjusting encoding of categorical variables in a regression model? It's not clear to me what you are trying to accomplish.

shoffmeister

Community Trekker

Joined:

Mar 27, 2015

As far as I know, if you want to use dummy-coding instead of effect-coding in your models you will have to create the dummy-variables manually.

In most recent versions of JMP you can do so by "Cols=>Utilities=>Make Indicator Columns". Then use the dummy-variables as factors in your model (of course you should only use all but one).

Hope that helps.

jiancao

Staff

Joined:

Jul 7, 2014

Creating dummy variables is one approach. But if your model is standard least squares, there is an option called Indicator Parameterization Estimates that does just that.

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