[R] p-values of correlation matrix
Hello, I have a data frame containing several parameters. I want to investigate pair wise correlations between all of the parameters. For doing so I used the command cor(data.frame, method=”spearman”), the result is a matrix giving me the correlation coefficients of each pair, but not the p-values. Is it possible to get same matrix showing just the p-values instead of the correlation coefficients? As far as I know the command cor.test just works for two given vector, but not for a whole data frame. Thanks! - Tamara Hoebinger University of Vienna -- View this message in context: http://www.nabble.com/p-values-of-correlation-matrix-tp23023454p23023454.html Sent from the R help mailing list archive at Nabble.com. __ 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.
Re: [R] p-values of correlation matrix
On 4/13/2009 10:56 AM, thoeb wrote: Hello, I have a data frame containing several parameters. I want to investigate pair wise correlations between all of the parameters. For doing so I used the command cor(data.frame, method=”spearman”), the result is a matrix giving me the correlation coefficients of each pair, but not the p-values. Is it possible to get same matrix showing just the p-values instead of the correlation coefficients? As far as I know the command cor.test just works for two given vector, but not for a whole data frame. Thanks! library(Hmisc) ?rcorr - Tamara Hoebinger University of Vienna -- 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 __ 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.
Re: [R] p-values of correlation matrix
Have a look at function rcor.test() from package ltm, e.g., library(ltm) mat - matrix(rnorm(1000), 100, 10, dimnames = list(NULL, LETTERS[1:10])) rcor.test(mat) rcor.test(mat, method = kendall) rcor.test(mat, method = spearman) I hope it helps. Best, Dimitris Hello, I have a data frame containing several parameters. I want to investigate pair wise correlations between all of the parameters. For doing so I used the command cor(data.frame, method=âspearmanâ), the result is a matrix giving me the correlation coefficients of each pair, but not the p-values. Is it possible to get same matrix showing just the p-values instead of the correlation coefficients? As far as I know the command cor.test just works for two given vector, but not for a whole data frame. Thanks! - Tamara Hoebinger University of Vienna -- View this message in context: http://www.nabble.com/p-values-of-correlation-matrix-tp23023454p23023454.html Sent from the R help mailing list archive at Nabble.com. __ 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. -- Dimitris Rizopoulos Assistant Professor Department of Biostatistics Erasmus University Medical Center Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands Tel: +31/(0)10/7043478 Fax: +31/(0)10/7043014 __ 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.
