Re: Make sparse automatic mutation to dense matrices optional

[David Bateman]

John W. Eaton wrote:
> On 16-Nov-2007, David Bateman wrote:
> 
> | While looking at SeDuMi one issue I had was that much of the code
> | assumes that once a matrix is sparse it will stay that way and it so
> | SeDuMi just assumes that certain matrices are sparse in some of its
> | internal mex functions. Octave's habit of converting sparse matrices to
> | full ones if that saves space, plays havoc with this.
> | 
> | I therefore propose to include an internal variable Vsparse_auto_mutate
> | that can be used to enable or disable this functionality and that the
> | "-traditional" option turns this off as that is what matlab does.
> 
> I think this patch is OK, but maybe we should set sparse_auto_mutate
> to false by default for compatibility.
> 
> jwe


It is for matlab compatibility mode, but not in general. Do you want it
to be off by default always?

D.