[R]parameters calculated by lda and qda
Hi, I am not sure if I remember correctly a mail last week to this messageboard where Prof Ripley said Fisher's discriminants are not used in lda within R and that Rao's are used instead, is this true? I looked in MASS (1996) but I couldn't find the reference to this in chapter 12 (multivariate analysis), the (help)lda doesn't tell me either. Could anyone tell me where can I find out this information as I am also interested in the method for qda? Thanks Anne __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] lda
Hello I have been using r to classify fish into groups using the lda formula and predict(object,)$class. I am having problems finding an output that simultaneously shows me classification function coefficients for predictors and groups (such as is given in spss under classify:linear discriminant for example). I have tried coef.lda which shows linear discriminant functions for predictors but not groups. Meanwhile predict.lda only gives the case by case posterior probabilities for each group and doesn't show predictors. Can anyone please advise? Anne __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] qda plots
Hi, I have been using some of the functions in r for classification purposes, chiefly lda, qda, knn and nnet. My problem is that the only one I can figure out how to represenent graphically is lda (using plot.lda). I have tried 'fooling' this function into accepting qda input for plotting but to no avail. I wonder if you have any suggestions? Thanks alot, Anne Marie Power Marine lab. Dept. Zooogy Animal Ecology, University College Cork Ireland __ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
