JMP and dummies

[#1]

Hi there,

thanks in advance for your help. I am new to JMP (version 10) and I would really appreciate an explanation of how JMP handles nominal and ordinal variables in the OLS regression. In other words, how it generated the dummies once you include a nominal or ordinal variable between the predictors.

Thank you.

G

[#2]

I think you'll find what you're looking for in The Factor Models section of the JMP Online Documentation.

In part it says:

Nominal factors are transformed into indicator variables for the design matrix. SAS GLM constructs a...











































GLM

JMP

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A1

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A23

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In GLM, the linear model design matrix has linear dependencies among the columns, and the least squa...
In JMP, the linear model design matrix is coded so that it achieves full rank unless there are missi...

-Jeff