[Rd] a bug in glm.fit() (PR#7947)

From: <jyzz88_at_gmail.com>
Date: Thu 16 Jun 2005 - 03:42:27 GMT


glm.fit() gave me the same AIC's regardless of TRUE or FALSE intercept option.

> myX <- as.matrix(1:10)
> myY <- 3+5*myX
> foo <- glm.fit(x=myX, y=myY, family = gaussian(link = "identity"), intercept=TRUE)
> foo$aic

[1] 38.94657
> foo <- glm.fit(x=myX, y=myY, family = gaussian(link = "identity"), intercept=FALSE)
> foo$aic


[1] 38.94657
> AIC(lm(myY~0+myX, data=data.frame(myY,myX)))
[1] 38.94657
> AIC(lm(myY~1+myX, data=data.frame(myY,myX)))
[1] -650.9808

-Luke



R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel Received on Thu Jun 16 13:46:18 2005

This archive was generated by hypermail 2.1.8 : Mon 20 Feb 2006 - 03:21:09 GMT