Amit Kumar
2009-Oct-13 14:13 UTC
[R] How to calculate average correlation coefficient of a correlation matrix ?
Hi! All, I have large correlation matrix Cor. I wish to calculate average correlation coefficient for this matrix. Is there any function in R to do this? Thanks in advance. Amit
Chuck Cleland
2009-Oct-13 14:38 UTC
[R] How to calculate average correlation coefficient of a correlation matrix ?
On 10/13/2009 10:13 AM, Amit Kumar wrote:> Hi! All, > I have large correlation matrix Cor. I wish to calculate average > correlation coefficient for this matrix. > Is there any function in R to do this? > Thanks in advance.cormat <- cor(iris[,1:4]) corlowtri <- cormat[lower.tri(cormat)] corlowtri [1] -0.1175698 0.8717538 0.8179411 -0.4284401 -0.3661259 0.9628654 mean(corlowtri) [1] 0.2900708 mean(abs(corlowtri)) [1] 0.594116 avgcor <- function(x){mean(abs(x[lower.tri(x)]))} avgcor(cor(iris[,1:4])) [1] 0.594116> Amit > > ______________________________________________ > R-help at 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.-- Chuck Cleland, Ph.D. NDRI, Inc. (www.ndri.org) 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894