R中矩阵的秩

Question

我想测试一个矩阵的等级,是否有人可以为此推荐R中的包/函数？

Answer 1

您可以尝试该函数qr("qr",因为它执行QR分解):

#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]

Answer 2

http://cran.r-project.org/web/packages/Matrix/Matrix.pdf，第 101 页

http://cran.r-project.org/web/packages/matrixcalc/matrixcalc.pdf，第 12 页