Dear R-gurus, Here is what I need to do.. I have two .txt files that are in a matrix form (each looks something like this: 0.033482 0.02238 0.026677 0.034553 0.023226 0.028855 0.035017 0.023262 0.02941 0.036262 0.023306 0.029706 0.037252 0.024644 0.032053 ) I need to write a code such that it pulls these two matrices into a data frame and then runs the LDA and compares the classification results of the two stimuli against one another. I am not sure how to do that at all, but here is what I have thus far (not sure about the syntax 100%) # lda, nnet, prcomp, etc are in the MASS library library(MASS) # pull matrices (made by 3dmaskdump) into a data frame #first file L_heap_hoop_4 <- data.frame(as.matrix(t(read.table(file="L_Heap_4_top_ten.txt")))*100000,syll = c(rep("heap")) <~~~ NEED specification here #second file L_heap_hoop_4 <- data.frame(as.matrix(t(read.table(file="L_Hoop_4_top_ten.txt")))*100000,syll = c(rep("hoop")) <~~~ NEED specification here # run the LDA and compare the clasification results of the two stimuli against one another table(lda(syll ~ ., L_heap_hoop_4, CV =TRUE)$class,$syll) .... any input would be highly appreciated. -- View this message in context: http://n4.nabble.com/Linear-Discriminant-Analysis-in-R-tp998567p998567.html Sent from the R help mailing list archive at Nabble.com.