Created
July 18, 2011 12:47
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A Better Way to Compute All Diagonal Principal Minors
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| library(gregmisc) | |
| minor2 = function(mat, idx){ | |
| little_mat = mat[idx,idx] | |
| return(det(little_mat)) | |
| } | |
| index_vec = combinations(nrow(mat),2) | |
| minors = apply(index_vec, MARGIN=1, FUN=function(ix){ minor2(mat,ix)}) |
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