Dear list, I have two martix like these, each rows with name in the matrix.
I try to select rows with identical name from two matrix and calculate their correlation. Matrix1: 2-Sep 9 5.5 1 7.18 10.0 8 139.45 2-Sep 7 4.9 15 8.22 61.68 9 123.62 4-Sep 5-Sep AAMP A2M A2M . . . Matrix2: 2-Sep 4 7 1 6.8 12 8 19.4 2-Sep 2 8 15 2.2 6.8 12 13.2 4-Sep AAMP AAMP ABCA5 A2M A2M I try to select rows with identical name from two matrix and calculate their correlation. However, I got trouble when loading these two matrix into R as header=TRUE. So I use header=FLASE and these name become character in the first column. How do I extract the first column of matrix 1 and compare to the first column of matrix 2? And if they are identical I compute their correlation? SIncerely yours, Chiahsin Liu [[alternative HTML version deleted]] ______________________________________________ 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.