Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #33316

Re: Division matrix

Show all headers | View raw

Le mardi 13 novembre 2012 02:00:28 UTC+1, Cleuson Alves a écrit :
> Hello, I need to solve an exercise follows, first calculate the inverse matrix and then multiply the first matrix.
> 
> I await help.
> 
> Thank you.
> 
> follows the code below incomplete.
> 
> 
> 
> m = [[1,2,3],[4,5,6],[7,8,9]]
> 
> x = []
> 
> for i in [0,1,2]:
> 
>     y = []
> 
>     for linha in m:
> 
>         y.append(linha[i])
> 
>     x.append(y)
> 
> 
> 
> print x
> 
> [[1, 4, 7], [2, 5, 8], [3, 6, 9]]
> 
> 
> 
> def ProdMatrix(x,b):
> 
>     tamL = len(x)
> 
>     tamC = len(x[0])
> 
>     c = nullMatrix(tamL,tamC)
> 
>     for i in range(tamL):
> 
>         for j in range(tamC):
> 
>             val = 0
> 
>             for k in range(len(b)):
> 
>                 val = val + x[i][l]*b[k][j]
> 
>             c[i][j]
> 
>     return c

------

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

jmf

Back to comp.lang.python | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Division matrix Cleuson Alves <cleuson.o@gmail.com> - 2012-11-12 17:00 -0800
  Re: Division matrix Ian Kelly <ian.g.kelly@gmail.com> - 2012-11-12 18:25 -0700
  Re: Division matrix Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-11-13 13:48 -0500
  Re: Division matrix "R. Michael Weylandt" <michael.weylandt@gmail.com> - 2012-11-13 22:14 +0000
  Re: Division matrix wxjmfauth@gmail.com - 2012-11-14 01:04 -0800

csiph-web