R中矩阵的秩 [英] Rank of a matrix in R

问题描述

我想测试矩阵的秩，有没有人可以为此推荐 R 中的包/函数?

I want to test the rank of a matrix, is there someone who can recommend a package/function in R for this?

推荐答案

你可以试试函数 qr ("qr"，因为它执行一个 QR 分解):

You can try the function qr ("qr", because it performs a QR decomposition):

#define a matrix for this example
M <- matrix(data = rnorm(12), ncol = 3)

#run the function qr() 
qr(M)$rank

#Alternative: load the Matrix package...
require(Matrix)

#...and run the function rankMatrix()
rankMatrix(M)[1]

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