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Thank you! This seems to work!!! Silvia. Charles C. Berry wrote: > > > See below > > On Wed, 29 Apr 2009, Silvia Lomascolo wrote: > >> >> Hi R community, >> I am trying to obtain a sample from a matrix but sample(my.matrix) >> doesn't...

Hi R community, I am trying to obtain a sample from a matrix but sample(my.matrix) doesn't do what I need. I have a matrix of 1287 interactions between the species in columns and the species in rows...

Both Oliver's and Chuck's code seem to work. Thank you very much!! I will keep working on this and might get back to the forum for more help if I get stuck. Thanks, really. PS: Does any of...

I work with Windows, R version 2.4.1 I am trying to plot the results of a discriminant analysis done using the lda function in the MASS library. The discriminant. analysis goes like this: data.tb<-read.table('C...

Thanks for trying to answer even if my question isn't very clear. Please allow me to try again with an example: I want to predict group membership by the three variables below, and then plot the results in one...

It was suggested that the 'NAs introduced by coercion' message might be warning me that my data are not what they should be. I checked this using str(PeaksMatrix), as suggested, and the data seem to be what I thought...

I work on Windows, R version 2.4.1. I'm very new with R! I am trying to build a classification tree using rpart but, although the matrix has 108 variables, the program builds a tree with only one...

I use Windows, R version 2.5.1 When I try to run stepclass (klaR) I get an error message/warning saying: 1: error(s) in modeling/prediction step in: cv.rate(vars = c(model, tryvar), data = data, grouping = grouping...

I work with Windows, R 2.4.1. I'm a beginner with R! After doing a Discriminant Function Analysis, I am trying to run manova to get a measure of significance of my lda results. I want to predict...