search for: naiara

Dear all, I need to do a Manova but I have an unbalanced design. I have morphological measurements similar to the iris dataset, but I don't have the same number of measurements for all species. Does anyone know a procedure to do Manova with this kind of input in R? Thank you very much, Naiara. -------------------------------------------- Naiara S. Pinto Ecology, Evolution and Behavior 1 University Station A6700 Austin, TX, 78712

...rganized as follows: order--family--species--location--number of individuals I couldn't figure out how to change the data on my text file to be imported into R; and after you do that, is it possible to convert the table into a data frame? Any tips would be greatly appreciatted! Thanks a lot, Naiara. -------------------------------------------- Naiara S. Pinto Ecology, Evolution and Behavior 1 University Station A6700 Austin, TX, 78712

...independent variables. I am not sure if I guessed the starting parameters right, which I imagine could be a source of error. Here's my code: > polr(a~b+c, method="logistic", start=c(10, 0.06)) Does anyone have any ideas why I am getting this error message? Thank you very much, Naiara. -------------------------------------------- Naiara S. Pinto Ecology, Evolution and Behavior 1 University Station A6700 Austin, TX, 78712

...R returns "List". However when I use srt I get: `data.frame': 456 obs. of 1 variable: $ V1: num 0.6344 0.4516 0.0968 0.7634 0.7957 ... My file consists of one column only (no headers) and I can't figure out why I am getting this error message. Why does this happen? Thanks! Naiara. -------------------------------------------- Naiara S. Pinto Ecology, Evolution and Behavior 1 University Station A6700 Austin, TX, 78712

...bset of the predictor variables. I was thinking of setting mtry = number of predictor variables, growing several trees, and computing the support for each node as the number of times that a certain predictor variable was chosen for that node. Can this be implemented using random forests? Thanks! Naiara. -- Naiara Pinto PhD Candidate Ecology, Evolution and Behavior University of Texas Austin

...sampsize is a vector of the length the number of strata, then sampling is stratified by strata, and the elements of sampsize indicate the numbers to be drawn from the strata". I need my sampling to be done with factors, but I am doing a regression. Does anyone know a way to do that? Thanks, Naiara. [[alternative HTML version deleted]]

...h a different color. The kind of stuff you would do with "holdon" in Matlab. I read a recent message that was posted to this list with a similar problem, but I couldn't understand the reply. Could someone give me one example? How do you plot subgroups using scatter3d? Thanks a lot! Naiara. -------------------------------------------- Naiara S. Pinto Ecology, Evolution and Behavior 1 University Station A6700 Austin, TX, 78712

...~., data=myData, mtry=5, importance=TRUE, strata = factor(studySites), sampsize=mySampSize) But randomForest gives me the following error: Error in randomForest.default(m, y, ...) : sampsize can not be larger than class frequency Does anybody have any idea why this happens? Thank you very much, Naiara.

...s not installed, install it. ERROR: configuration failed for package 'rgdal' If I understood the R Utils docs correctly, --configure-args will accept one argument only (so the first statement is always dropped). What should I do if I need to specify the paths to several files? Thank you, Naiara. [[alternative HTML version deleted]]

...#39;0.00"W, 18d 0'0.00"S) Center ( -52.7499999, -16.2500001) ( 52d45'0.00"W, 16d15'0.00"S) I am not sure this is a problem, but I don't remember seeing this before. Does anybody know if there is an older version that gives the correct information? Thanks, Naiara. [[alternative HTML version deleted]]