Am Freitag, 13. August 2004 20:58 schrieb Jacob \(Jack\) Gryn:
> Is there a function that calculates the norm of a matrix? Maybe we should
> implement it?
In blas1++.h, there are several norms for vectors. In blas++.h, there is
Norm_Inf for most matrices. Norm2 should probably be added, too, somewhere.
Funny that I didn't need it so far...
> How about pointwise operators? i.e. a pointwise division..
You mean element-wise? Is there a lapack (blas) procedure for that? Probably
not. (Seems to me that this operation is not needed for numerics.) Anyway,
yes, you can implement this somewhere as an auxiliary function.
> I also have an unrelated question. Can operator's be created for any ascii
> character/string, or they are limited to the same operators already used by
> C++?
>
> For example, if I wanted to make a pointwise multiplier, could I do
> operator.*= (note the dot before the asterisk)
I don't think that's possible. On the other hand I'm not sure. Why don't you
look that up in e.g. the Stroustrup book...
Christian
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