Nico Coallier
  • Member for 6 years, 2 months
  • Last seen more than a month ago
Pseudo R squared formula for GLMs
6 votes

The formula you proposed have been proposed by Maddala (1983) and Magee (1990) to estimate R squared on logistic model. Therefore I don't think it's applicable to all glm model (see the book Modern ...

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Should I use ANOVA OR ANCOVA?
1 votes

The simple answer would be that if you only compare the average between two groups , you should use ANOVA. The ANCOVA is used when you have a co-variate.

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Justification by enhancement of $R^2$
0 votes

The short answer would be no. You could , per example, overfit your model and get a greater R squared. Try comparing your model by AIC (https://en.wikipedia.org/wiki/Akaike_information_criterion ).

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Is it possible to make a regression with known standard error on y
Accepted answer
0 votes

Thanks to Roland, I have solve this problem. If someone is looking to adjust the slope of a regression in function of a known error on the dependent variable, the function varIdent is very useful. ...

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repeated measures in irregular interval
0 votes

I would use lmer in the package lme4. You could then put the patient ID as a random effect. http://www.inside-r.org/packages/cran/lme4/docs/lmer

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