Sistemas Lineares e Matrizes

6.1 No computador

A inversão e a transposição também estão definidas no Octave:

octave:1> A=[2,3;-1,-1]
A =

   2   3
  -1  -1

octave:2> inv(A)
ans =

  -1  -3
   1   2

octave:3> B=[1,2;2,4]
B =

   1   2
   2   4

octave:4> inv(B)
warning: matrix singular to machine precision
ans =

   Inf   Inf
   Inf   Inf

octave:5> C=[2,4,-3,3,-9;0,-2,1,-1,3;2,2,-2,1,5;0,0,0,0,1]
C =

   2   4  -3   3  -9
   0  -2   1  -1   3
   2   2  -2   1   5
   0   0   0   0   1

octave:6> C'
ans =

   2   0   2   0
   4  -2   2   0
  -3   1  -2   0
   3  -1   1   0
  -9   3   5   1