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Modeling and Multivariate Methods - SAS

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Chapter 6 Fitting Generalized Linear Models 195<br />

Platform Comm<strong>and</strong>s<br />

Diagnostic Plots is a submenu containing comm<strong>and</strong>s that allow you to plot combinations of residuals,<br />

predicted values, <strong>and</strong> actual values to search for outliers <strong>and</strong> determine the adequacy of your model.<br />

Deviance is discussed above in “Model Selection <strong>and</strong> Deviance” on page 182. The following plots are<br />

available:<br />

• Studentized Deviance Residuals by Predicted<br />

• Studentized Pearson Residuals by Predicted<br />

• Deviance Residuals by Predicted<br />

• Pearson Residuals By Predicted<br />

• Actual by Predicted<br />

• Regression Plot is available only when there is one continuous predictor <strong>and</strong> no more than one<br />

categorical predictor.<br />

• Linear Predictor Plot is a plot of responses transformed by the inverse link function. This plot is<br />

available only when there is one continuous predictor <strong>and</strong> no more than one categorical predictor.<br />

Save Columns is a submenu that lets you save certain quantities as new columns in the data table.<br />

Formuals for residuals are shown in Table 6.3.<br />

Prediction Formula<br />

Predicted Values<br />

Mean Confidence<br />

Interval<br />

Save Indiv Confid<br />

Limits<br />

Deviance Residuals<br />

Pearson Residuals<br />

Studentized Deviance<br />

Residuals<br />

Studentized Pearson<br />

Residuals<br />

(JSL only) Parametric<br />

Formula<br />

Saves the formula that predicts the current model.<br />

Saves the values predicted by the current model.<br />

Saves the 95% confidence limits for the prediction equation. The confidence<br />

limits reflect variation in the parameter estimates.<br />

Saves the confidence limits for a given individual value. The confidence<br />

limits reflect variation in the error <strong>and</strong> variation in the parameter estimates.<br />

Saves the deviance residuals.<br />

Saves the Pearson residuals.<br />

Saves the studentized deviance residuals.<br />

Saves the studentized Pearson residuals.<br />

Saves the parametric formula using JSL:<br />

fit model object

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