[Fwd: Re: Error in LUDecomposition?]

[Ronald Boisvert <boisvert@nist.gov>]

Sender: Rupert Parson <rupert.parson@gmail.com>
Subject: Re: Error in LUDecomposition?


OK - I've looked into the code a little more closely and see it is due
to the fact that the LUDecomposition class only works for the case m
>= n, and not for m < n, despite what is stated in its Javadoc.

I am wondering when this might be rectified?  I note that Ron Boisvert
has commented on this in the past.

Many thanks,

Rupert


2009/8/20 Rupert Parson <rupert.parson@gmail.com>:
> I am getting an java.lang.ArrayIndexOutOfBoundsException:       at
> Jama.LUDecomposition.<init>(LUDecomposition.java:107).
>
> Looking at the code, I see that this line is:
>
>           if (j < m & LU[j][j] != 0.0) {
>
> and I am wondering if it should actually read:
>
>           if (j < m && LU[j][j] != 0.0) {
>
> as using the non-short-circuiting logical operator "&" rather than
> "&&" would seem to make the first condition of the conditional
> statement rather redundant!?
>
> Many thanks,
>
> Rupert Parson
>