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Modeling and Multivariate Methods - SAS

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48 Introduction to the Fit Model Platform Chapter 2<br />

Fitting Personalities<br />

Transformations<br />

The Transform options transform selected continuous effects or Y columns.<br />

The Arrhenius transformation isT * = ------------------------------------<br />

11605<br />

Temp + 273.15<br />

Fitting Personalities<br />

The Fit Model platform provides many different fitting methods, called personalities in JMP. Normally, the<br />

personality is automatically selected from the context of the response <strong>and</strong> the factors that you enter, but you<br />

can change the personality from the Personality menu.<br />

Table 2.5 briefly describes each personality <strong>and</strong> provides references to further details.<br />

Table 2.5 Description of Fitting Personalities<br />

Personality Description Reference<br />

St<strong>and</strong>ard Least Squares<br />

Stepwise<br />

Manova<br />

LogLinear Variance<br />

Nominal Logistic<br />

Ordinal Logistic<br />

Provides a continuous-response fit to<br />

a linear model of factors using least<br />

squares.<br />

Stepwise regression is an approach to<br />

selecting a subset of effects for a<br />

regression model. The Stepwise<br />

feature computes estimates that are<br />

the same as those of other least<br />

squares platforms, but it facilitates<br />

searching <strong>and</strong> selecting among many<br />

models.<br />

Fits multiple Y variables to the set of<br />

specified effects <strong>and</strong> provides<br />

multivariate tests.<br />

Models the variability in the<br />

response.<br />

Fits a logistic regression to a nominal<br />

response.<br />

Fits a logistic regression to an ordinal<br />

response.<br />

See the “Fitting St<strong>and</strong>ard Least<br />

Squares Models” chapter on<br />

page 53.<br />

See the “Fitting Stepwise<br />

Regression Models” chapter on<br />

page 133.<br />

See the “Fitting Multiple Response<br />

Models” chapter on page 155.<br />

See the “Fitting Dispersion Effects<br />

with the Loglinear Variance<br />

Model” chapter on page 303.<br />

See the “Performing Logistic<br />

Regression on Nominal <strong>and</strong><br />

Ordinal Responses” chapter on<br />

page 197.<br />

See the “Performing Logistic<br />

Regression on Nominal <strong>and</strong><br />

Ordinal Responses” chapter on<br />

page 197.

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