Re: [Maxima-lang-fr] =?iso-8859-1?q?Num_et_Denom_d=27un_=E9l=E9ment_d?= =?iso-8859-1?q?_=27une_matrice?=

[Silvain D. <sil...@bl...>]

At 02:23 02/02/2007, Robert Dodier wrote:
>On 2/1/07, seb_kramm <seb...@ya...> wrote:

Je pense aussi que les =E9l=E9ments de votre matrice=20
sont probablement eux-m=EAmes des listes ou des=20
matrices... Normalement, A[1][1] donne un=20
=E9l=E9ment, pas une sous-matrice, donc le param=E8tre scalarmatrixp
ne devrait pas intervenir.
Vous pouvez essayer d'utiliser A[1][1][1] pour=20
extraire l'=E9l=E9ment voulu, =E0 d=E9faut de corriger le=20
programme en amont, pour vous d=E9barrasser de ces crochets...

> > Ceci est mon premier message sur cette liste....
>...
>A : matrix ([a/w, b/x], [c/y, d/z]);
>num (A);
>   =3D> matrix([a/w,b/x],[c/y,d/z])
>denom (A);
>   =3D> 1
>matrixmap (num, A);
>   =3D> matrix([a, b], [c, d])
>matrixmap (denom, A);
>   =3D> matrix([w, x], [y, z])
>
>Most Maxima functions do not automatically process a list or matrix
>element by element. The functions map and matrixmap apply a
>function element by element.
>
> > Quand j'extrait un des =E9l=E9ments, il apparait bien sous forme de=
 fraction,
> > mais toujours encadr=E9 par des crochets !!
>
>Hmm. From this, it appears your matrix is a nested matrix --
>a matrix with elements that are also matrices. Is that intentional?
>
>Sorry, I can read a little French but I can't write it.
>
>Hope this helps!
>
>Robert Dodier
>
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