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...'m using to make my combination, as presented by Bocard in Numerical Ecology Analysis with R chapter 4 or 5. with this code, it is possible to join PCA and Cluster however, without differentiating the colors of each ecosystem. #PCA mydata.pca<-rda(mydata) #Cluster mydata.w <- hclust(dist(Sqchord.mydata), "ward") plot(mydata.w, hang=-1) rect.hclust(mydata.w, 5) # Cut the dendrogram to yield 5 groups gr <- cutree(mydata.w, k=5) grl <- levels(factor(gr)) # Get the site scores, scaling 1 sit.sc1 <- scores(mydata.pca, display="w", scaling=3) # Plot the sites with...

Hi, I need to build ROC curve in R, can you please provide data steps / code or guide me through it. Thanks and Regards Rithesh M Mohan [[alternative HTML version deleted]]