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Both worked, thanks! N. Fernandez > Katharine Mullen: > > require(splines) > x<-1:5 > y <- c(0.31, 0.45, 0.84, 0.43, 0.25) > yy <-predict(interpSpline(x, y)) > plot(x, y) > lines(yy) > > Greg Snow: > lines(spline(x,y...

Dear all, I need to assign new observations to cluster groups previously identified for a different dataset. The original clustering was performed using Clara. I gess one way is to assign each new observation to the nearest medioid of the...

Dear all, I want to evaluate several generalized linear mixed models, including the null model, and select the best approximating one. I have tried glmmPQL (MASS library) and GLMM (lme4) to fit the models. Both result in similar parameter estimates...

Dear all, I'm trying to estimate clusters from a very large dataset using clara but the program stops with a memory error. The (very simple) code and the error: mydata<-read.dbf(file="fnorsel_4px.dbf") my.clara.7k...

Sorry, I answered too quickly. It worked with the "simplified" example I provided but not with non-regular intervals in x: x<-c(-45,67,131,259,347) y <- c(0.31, 0.45, 0.84, 0.43, 0.25...

Hi, I?m trying to get smooth curves connecting points in a plot using "spline" but I don?t get what I whant. Eg.: x<-1:5 y <- c(0.31, 0.45, 0.84, 0.43, 0.25) plot...

Dear All, I need to calculate the optimal number of clusters for a classification based on a large number of observations (tens of thousands). Thibshirani et al. proposed the gap statistic for this purpose. I tried the R-code developed...

Dear all, Thanks for the responses to this post. I understand that the topic still requires more research. However, I am a non-statistician in a desperate need to analyze my ecological data with the currently available tools. Please excuse...