search for: boneheadedness

...heteroscedasticity; a more detailed example comparing fits of lm() and gls() to a simpler simulation [linear regression] shows similar, although less extreme, behavior, and is posted at http://www.zoo.ufl.edu/bolker/splinelik.Rnw (or http://www.zoo.ufl.edu/bolker/splinelik.pdf ). Apologies for boneheadedness, but I have taken this as far as I can for now ... ------------- ## simulate "data" (exponential decrease w/ heterosced.) set.seed(1001) n=1000 x = sort(runif(n)) grow_det = exp(-2*x) grow_var = 0.1*grow_det^2 y = rnorm(n,mean=grow_det,sd=sqrt(grow_var)) dat = data.frame(x=x,y=y) ## nlme...

Just a quick question, in case I'm doing something really boneheaded that could be easily sorted out. I'm attempting to save() datasets on Linux (R 1.1.1) and load() them on Win2K (rw1011, fetched from CRAN today). I get the "restore file corrupted" message every time. I've tried saving with ascii=TRUE and FALSE, and the ASCII versions look OK (it's my impression

I'm sure I'm doing something completely boneheaded here, but I've used this idiom (constructing an interpolation spline and using prediction from a backSpline to find an approximation profile confidence interval) many times before and haven't hit this particular problem: r2 <- c(1.04409027570601, 1.09953936543359, 1.15498845516117, 1.21043754488875,

Greetings! (and apologies upfront for any duplication as a result of my cross-posting) It''s been five weeks now since I began working with RoR. My experience has been incredibly positive. So much so that I''m emboldened to undertake a project I''d previously concluded I no longer had the technical chops to even _start_. I''ve included a brief description of