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Date: Wed, 14 Nov 2012 01:04:09 -0800 (PST)
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Subject: Re: Division matrix
From: wxjmfa...@gmail.com
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Le mardi 13 novembre 2012 02:00:28 UTC+1, Cleuson Alves a =E9crit=A0:
> Hello, I need to solve an exercise follows, first calculate the inverse m=
atrix and then multiply the first matrix.
>=20
> I await help.
>=20
> Thank you.
>=20
> follows the code below incomplete.
>=20
>=20
>=20
> m =3D [[1,2,3],[4,5,6],[7,8,9]]
>=20
> x =3D []
>=20
> for i in [0,1,2]:
>=20
>     y =3D []
>=20
>     for linha in m:
>=20
>         y.append(linha[i])
>=20
>     x.append(y)
>=20
>=20
>=20
> print x
>=20
> [[1, 4, 7], [2, 5, 8], [3, 6, 9]]
>=20
>=20
>=20
> def ProdMatrix(x,b):
>=20
>     tamL =3D len(x)
>=20
>     tamC =3D len(x[0])
>=20
>     c =3D nullMatrix(tamL,tamC)
>=20
>     for i in range(tamL):
>=20
>         for j in range(tamC):
>=20
>             val =3D 0
>=20
>             for k in range(len(b)):
>=20
>                 val =3D val + x[i][l]*b[k][j]
>=20
>             c[i][j]
>=20
>     return c

------

Pedagogical hint:
Before blindly calculating the inverse matrix, it may be
a good idea to know if the inverse matrix exists.

jmf