Re: About diagonal matrices

[Søren Hauberg]

lor, 21 02 2009 kl. 19:48 +0100, skrev Jaroslav Hajek:
> Btw. if there is an agreement that this is necessary, then a
> relatively quick and painless solution (that would not further delay
> 3.2) is to make the special treatment of diagonal & permutation
> matrices optional (that would probably involve just modifying a few
> methods).

I don't like the idea of having some variable that changes the behaviour
of programs. Assume you provide me with a function that depends the
value of this variable. Now, I have to incorporate this function in a
program of mine that depends on the variable having the opposite value
as yours. Then my combined code would have to look like this

  special_diagonal_treatment (true);
  some_function ();

  special_diagonal_treatment (false);
  some_other_function ();

Now assume we have couple of variables like this one, and what you have
is a collaboration (and debugging) nightmare.

Soren