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I have a matrix such as this, [,1] [,2] [,3] [1,] 1 1 2 [2,] 2 5 5 and a larger matrix such as this, a b [1,] 1 5 [2,] 2 5 [3,] 4 9 [4,] 5 8 [5,] 7 8 [6,] 7 10 [7,] 9 10 what I want to do is check the number of times the columns in the first matrix appear as rows in the second matrix. So for instance in this example 1,5 and 2,5 appear in both so I'd want

I have 2 matrices. One which contains a complete set of row combinations. Another which contains a subset of the first. What I would like to extract is the rows which are in the first but not repeated in the second. For instance if the following were my two matrices, A [,1] [,2] [,3] [,4] [1,] 1 2 3 4 [2,] 1 2 3 5 [3,] 1 2 3 6 [4,] 1 2 3

Appologies if this is a simple problem. I have a matrix which is 86x3 and each row contains three integers. The problem I have is that some of the rows of integers are repeated in other rows and I only wish to have one copy of these rows. Is there a function that I can use which will identify these repeated rows and delete them from the matrix? I have searched for help with this problem but the

...1 2 3 [2,] 1 1 2 [3,] 1 2 3 [4,] 4 7 5 > unique(mat) [,1] [,2] [,3] [1,] 1 2 3 [2,] 1 1 2 [3,] 4 7 5 Stefano -----Messaggio originale----- Da: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]Per conto di dreamworx Inviato: venerd? 26 giugno 2009 15.10 A: r-help at r-project.org Oggetto: [R] Deleting repeated rows Appologies if this is a simple problem. I have a matrix which is 86x3 and each row contains three integers. The problem I have is that some of the rows of integers are repeated in other rows and...