还有,这个判断标准“100”到底是什么定义。
下面是其描述----------Description----------
The condition number of a regular (square) matrix is the product of the norm of the matrix and the norm of its inverse (or pseudo-inverse), and hence depends on the kind of matrix-norm.
定期(平方米)矩阵的条件数是矩阵和其逆(或伪逆),规范的标准的产品,因此对矩阵范数的一种依赖。
kappa() computes by default (an estimate of) the 2-norm condition number of a matrix or of the R matrix of a QR decomposition, perhaps of a linear fit. The 2-norm condition number can be shown to be the ratio of the largest to the smallest non-zero singular value of the matrix.
kappa()计算(估计)默认情况下,2 - 范数的条件数矩阵或R分解矩阵QR线性拟合,或许。 2规范的条件数可以被证明是最大的比例最小的非零矩阵的奇异值。


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