[Maxima] Help for some functions

ΝΙΚΟΣ ΠΛΟΣΚΑΣ mparmpaklo at gmail.com
Mon Oct 6 13:50:12 CDT 2008


Thank you for your reply.

Concerning the gamma function you are right. What i need is the
matrixmap(gamma, x);

But for function dgesvd still i do not understand how it works.
When i load(lapack) i did not get anything and then i should wrote to the
same line the next command.
When i try to load other packages i get the compilation messages, but for
lapack nothing.

Do you have any idea why i have this problem with load(lapack);

Thanks again,
Nick

Στις 6 Οκτώβριος 2008 8:14 μμ, ο χρήστης Robert Dodier <
robert.dodier at gmail.com> έγραψε:

> On Mon, Oct 6, 2008 at 5:40 AM, ΝΙΚΟΣ ΠΛΟΣΚΑΣ <mparmpaklo at gmail.com>
> wrote:
>
> > h [i, j] := (1 + i*random(1000) + j)/(j*random(1000))+random(1000);
> > x: genmatrix(h,10,10);
> > b: dgesvd(x);
> >
> > but again i get an error.
>
> Works for me (Maxima 5.16.2 + Windows XP).
> What is the error message?
>
> Note that you have to enter load(lapack); before calling dgesvd.
> load(lapack) produces a lot of compilation messages -- that's OK.
>
> > h [i, j] := (1 + i*random(1000) + j)/(j*random(1000))+random(1000);
> > x: genmatrix(h,10,10);
> > b: gamma(x);
> >
> > but again i get an error.
>
> Probably you want something like: matrixmap(gamma, x);
> Maxima math functions are defined for a single operand so if you
> want to apply a function to an aggregate object (e.g. list, set,
> or matrix) you need to say so explicitly (via some variety of map).
>
> HTH
>
> Robert Dodier
>
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