SNN wrote: > Hi, > > I have matrix of 300,000*115 (snps*individual). I ran the PCA on the > covariance matrix which has a dimention oof 115*115. I have the first 100 > individuals from group A and the rest of 15 individuals from group B. I need > to plot the data in two and 3 dimentions with respect to PC1 and PC2 and (in > 3D with respect to PC1, PC2 and PC3). I do not know how to have the plot > ploting the first 100 points corresponding to group A in red (for example) > and the rest of the 15 points in Blue? i.e I want the each group in a > diffrent color in the same plot. I appreciate if someone can help. > Hi Nancy, (if indeed you are a Nancy and that is not a webnym) Say that your groups really are coded "A" and "B", the group coding variable is called "group". You can define a color vector like this:
colorvector<-ifelse(group=="A","red","blue") Jim ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
