Mann-Whitney by group
Can you describe how your data is organized. It is clear there are eight columns, but it is not clear how the groups are represented, a Group column or do the groups have to be assembled from information in another column (a column with CD8.14, etc)? Create a small version of the data and use dput() to create a readable version that can be pasted into a plain text email (don't use html) usually results in a faster response. ---------------------------------------------- David L Carlson Associate Professor of Anthropology Texas A&M University College Station, TX 77843-4352
-----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r- project.org] On Behalf Of David Chertudi Sent: Friday, July 06, 2012 9:15 AM To: r-help at r-project.org Subject: [R] Mann-Whitney by group Hello, I'm having some issues grouping cases for some Mann-Whitney U tests I'm attempting to run. I'm willing to use wilcox.test if it'll work; I've also tried wilcox_test() from the "coin" package. Here's the deal: for each column (A through H), I would like to run the two-sample independent test, comparing Group 5 (CD8.14 through CD8.17) to Group 6 (CD8.18 through CD8.21). So, for A, test Group 5 agains Group 6, for B, test Group 5 against Group 6, and so on. I'm sure this is basic, but thank you in advance for any help you can provide. All the best, David [[alternative HTML version deleted]]
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