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Extracting data from a list of matrices
3 messages · Hubert Colt, Henrique Dallazuanna
Try this: lapply(l, '[', 1, 1)
On Thu, Jan 14, 2010 at 2:22 PM, Hubert Colt <hubert.colt at gmail.com> wrote:
Hi, Apologies in advance for the basic nature of my question. I am still very much a rookie when it comes to R. Having googled it, checked Nabble and trial/error to the best of my ability, I have yet to find an easy solution. I am currently working with a list of 5x5 matrices, and want to extract a list consisting of the first number of each matrix. In other words I want to go from: [[1]] ? ? ? ? ? ? ?[,1] ? ? ? ? ?[,2] ? ? ? ? ?[,3] ? ? ? ? ?[,4] ? ? ? ? ?[,5] [1,] ? ? ? ? ? ? a ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X [2,] ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X [3,] ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X [4,] ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X [5,] ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X [[2]] ? ? ? ? ? ? ?[,1] ? ? ? ? ?[,2] ? ? ? ? ?[,3] ? ? ? ? ?[,4] ? ? ? ? ?[,5] [1,] ? ? ? ? ? ? b ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X [2,] ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X [3,] ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X [4,] ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X [5,] ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X ? ? ? ? ? ? X etc. to a new list: ? ? ?[,1] [[1]] ? ?a [[2]] ? ?b etc. Any help will be greatly appreciated. -Hubert ? ? ? ?[[alternative HTML version deleted]]
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Henrique Dallazuanna Curitiba-Paran?-Brasil 25? 25' 40" S 49? 16' 22" O
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