Scrive Scott Clark <scott.clark@adelaide.edu.au>:
> Hi all,
>
> Just wondering if anyone can help a beginner - having trouble getting an
> R squared output from logistic regression in splus 6.2 student version.
> I get Deviance Residuals, Min 1Q Median 3Q Max, Coefficients, Value Std.
> Error, t value, intercepts, null deviance, Residual deviance, degrees
> of freedom, missing values and fisher score iterations BUT NO R squared
> or F test figures using the long format, no matter how I change the
> dialog box.
>
> Thanks
>
> Scott Clark
Scott,
F tests are no-sense doing a logistic regression. However, you can test the
difference in Deviance with a Chi square test. Save the model object with some
name (for example "scott.glm"), and then, from the comand line try:
>anova(scott.glm, test="Chi")
Hope this helps!
Achaz von Hardenberg
Alpine Wildlife Research Centre
Parco Nazionale Gran Paradiso
via della Rocca 47
10123 Torino, Italy
achaz.von.hardenberg@usherbrooke.ca
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