search for: matsize

Displaying 2 results from an estimated 2 matches for "matsize".

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2008 Jun 21
1
converting an R function into VBA
Hi everyone, I want to convert an R function into VBA for calculating the eigenvectors and eigenvalues of a matrix using the "Power Method". The function is: PowerMethod <- function(x, tolerance) {     my.mat <- var(x[,-1], na.method="available")     matSize <- dim(my.mat)[1]     eigenVec <- matrix(NA, nrow=matSize, ncol=matSize)     eigenVal <- rep(NA, matSize)     for(j in 1:matSize) {         x <- rep(1, matSize)         yk <- x + tolerance + 1          while(all(x-yk<tolerance)) {             yk <- my.mat%*%x             beta &...
2011 Nov 29
3
fill binary matrices with random 1s
Dear all, I am finding difficulty in the following, I would like to create an empty matrix e.g. 10x10 of 0s and sequentially fill this matrix with randomly placed a 1s until it is saturated. Producing 100 matrices of sequentially increasing density., This process needs to be randomized 1000 times., I assume i should run this along the following lines, 1) Create 1000 matrices all zeros, 2) add