search for: rcor

Dear all, I'm working on a data.frame named en.data, which has n cases and m columns. I generate the correlation matrix of en.data by > cor(en.data) I find that there is no p-value on each correlation in the correlation matrix. I searched in the R-help mail list and found some related posts, but I didn't find direct way to solve the problem. Someone said to use cor.test() or

Hi, What package would you recommend for analyzing the validity/reliability of multiple choice tests. Doing things such as classical test analysis, factor analysis, item response theory. I've used psychometric (item.exam), MiscPsycho (alpha.Summary), and ltm (rcor.test). MiscPsycho reported the numbers most similar to what I get in SPSS: corrected point biserial correlations, cronbach's alpha. I didn't understand what the psychometric package meant by its "discrimination" and "item reliability" numbers output by the item.exam fu...

Dear R team I have a problem with the installation of the RCOR package; any time I try to install it I get the error message: Error: package 'ROCR' was built before R 2.10.0: please re-install it. What can I do to solve this problem? Thank you Kind regards Dr. Matteo Pettinari Senior Assistant Cardiale Heelkunde matteo.pettinari@uzleuven.be<mailt...

...cts that have been measured in about 40 different variables (in this case a measure of brain metabolism). Now I want to look at possbile significant correlations between those variables. As some of the variables are not normally distributed I used "spearman" as method in the function rcor.test from the ltm-package. Unfourtunatly this results in more than 50 warnings like this due to ties: In cor.test.default(mat[, index[i, 1]], mat[, index[i, ... : Cannot compute exact p-value with ties I have now two question: 1. Is there any way to calculate a exact p-value for data that is...

i made jDialog through JGR package(Java gui 4 R), i want to export it with imported external package e.g.bio3d,RCOR , into .exe or if not possible convert code to executable jar file how should i go, give me package name,example codes (if possible) -- View this message in context: http://r.789695.n4.nabble.com/how-to-made-exe-of-any-gui-project-in-R-tp4375938p4375938.html Sent from the R help mailing list a...

...53647 0.6459346 0.4818648 0.6056680 [2,] 0.8253647 0.0000000 0.6897404 0.6225461 0.7880525 [3,] 0.6459346 0.6897404 0.0000000 0.3667110 0.6739433 [4,] 0.4818648 0.6225461 0.3667110 0.0000000 0.8367053 [5,] 0.6056680 0.7880525 0.6739433 0.8367053 0.0000000 Dimitris Rizopoulos suggested to look at rcor.test() from ltm, which I will do shortly. Thank you again for all your thorough answers, Monica _________________________________________________________________ esh_messenger_052008

Hi everybody, I would like to apply cor.test to a matrix with m rows and n columns and get the results in a list of matrices , one matrix for p.val, one for the statistic, one for the correlation and 2 for upper and lower confidence intervals, something analog with cor() applied to a matrix. I have done my own function to get a matrix of p.values and i suppose i can build similar functions for