matrix factorization and least squares with Matlab

I am workin on a project about comparing matrix factorization
techniques and other related issues with Matlab:

Does anybody know where I can find some code or code help on
1/LU factorization

2/Cholesky factorization

3/QR factorization

4/Linear Least Squares solving of Ax=b

.

Relevant Pages

  • Re: How to store factorization info when backslash, is used to solve matrix equation
    ... factorization method constructed it (not a MATLAB full or ... especially considering that using inv is less accurate. ... times with the same A but different right-hand-sides. ...
    (comp.soft-sys.matlab)
  • Fast matrix inversion
    ... Searching about matrix inversion I read that for large matrices (1000x1000 ... to be inverted is positive definitive using Cholesky factorization is even ... I tried these methods in Matlab and my results have me a little ... So may I conclude that in Matlab the fastest way to invert a large matrix ...
    (comp.dsp)
  • Re: An interesting numerical problem
    ... The fact that P19 contains integer does not matter IMO because DET calculation using LU factorization. ... LU factorization in Matlab is not so smart. ... numerical problems and theoretical problems ...
    (comp.soft-sys.matlab)
  • Re: efficient computation of many univariate least squares fits
    ... via QR factorization of M. ... In MATLAB the solution is just B = M\Y. ... deviations, and p x q matrices of cross-correlations, slopes, ...
    (sci.stat.math)
  • Matrix inversion using Cholesky factorization
    ... How would one go about inverting a matrix using cholesky ... factorization in matlab? ...
    (comp.soft-sys.matlab)
Loading