search for: 2000x2000

Dear R-users, I'd like to perform arithmetic functions on 1000 files containing a 2000x2000 matrix. Can anyone advise? For example, File1 File2 Output 1 1 1 4 4 4 5 5 5 2 2 2 + 5 5 5 = 7 7 7 3 3 3 6 6 6 9 9 9 Muhammad -- Muhammad Rahiz | Doctoral Student in Regional Climate Modeling Climate Research L...

Hi everyone, I have two matrices of 2000x2000 size. They consist of a measurement of RMSD deviations of a protein structure. The basic question i want to answer is the following: are there a significant differences between the two matrices? I aim to use the Mantel test. I don't really know if this is a good idea or if there are better sol...

Hi, Today I came accros a very interesting thing. I was asked how much time it takes for R to calculate the product of two large matrices. So I generated two 2000x2000 matrices of random normal numbers and measured the time with function system.time m1 <- matrix(rnorm(2000*2000),2000) m2 <- matrix(rnorm(2000*2000),2000) system.time(m3 <- m1%*%m2) and it produced 46.47 0.36 47.68 0.00 0.00 on Debian GNU/Linux Woody, R 1.6.1 computer. The same three...

I have a question about a movie I 've encoded with libtheora. It's a video 2000x2000 with Theora codec and no audio. The video is fine with some players, but it isn't read in youtube. http://www.ibiiztera.be/others/test3.ogv -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/theora/attachments/20101222/...

....i.logical() maybe inefficient"; can I suppress this warning somehow, this is slowing the computation very radically; 2) I can go around this problem by translating a sparseMatrix back into a logical matrix before I run spdiags on it. However, the loop gets very slow for large matrices (e.g., 2000x2000), which is the kind of matrices I have to handle. If you look in the code, I have placed a system.time() where the code is slowing down, and it takes about: user system elapsed 0.28 0.05 0.33 to complete an iteration...thus, I was wondering whether there is a more efficient way to do w...

Alex, I was getting the following crashes when editing cells in a grid: ./init.rb:1072:in `main_loop'': undefined method `begin_edit'' for "_p_wxEvent":String (NoMethodError) from ./init.rb:1072 but only after the first App GC mark phase. So I changed all the GridCell*Editor.i files from GC_MANAGE to GC_MANAGE_AS_EVENT. Which stopped the crashing. My question

Hi, I was trying to evaluate the pearson correlation and the p-values for an nxm matrix, where each row represents a vector. One way to do it would be to iterate through each row, and find its correlation value( and the p-value) with respect to the other rows. Is there some function by which I can use the matrix as input? Ideally, the output would be an nxn matrix, containing the p-values