| myorth {ffmanova} | R Documentation |
myorth(X) makes an orthonormal basis for the space spanned by the columns of X. The number of columns returned equals myrank(X), which is the rank of X.
myorth(X, tol_ = 1e-09) myrank(X, tol_ = 1e-9)
X |
numeric matrix. |
tol_ |
tuning parameter for the rank. |
The calculations are based on the singular value decomposition (svd). And myrank(X) is the number of singular values of X that are larger than max(dim(X))*svd(x)$d[1]*tol_.
myorth returns a matrix, whose columns form an orthonormal
basis.
myrank returns a single number, which is the rank of X.
In the special case where X has a single column, myorth(X) returns c*X where c is a positive constant.
Øyvind Langsrud and Bjørn-Helge Mevik