[R] Two ?'s:Permuting a data matrix and projection operator

J. Wan jyw at u.washington.edu
Thu Sep 20 05:33:35 CEST 2001


I have two questions:

1.  Is there an easy way/algorithm to obtain a series of permutated data
matrices which are obtained by permuting all the elements within each row?

Or is there a function that can permute all the elements for each row
instead of the whole matrix?

2.  Is there a function which helps find a matrix... projection operator
from p dimensional to p-1 dimensional subspace orthogonal to x, a real

Thanks for your help!


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