MATLAB: Calculate the inverse of a matrix

inversematrix

Hello, i want to calculate the reverse of this matrix :
 1    -1     0     0
-1     1     0     0
 0     0     1    -1
 0     0    -1     1
but I get the following result :
   Inf   Inf   Inf   Inf
   Inf   Inf   Inf   Inf
   Inf   Inf   Inf   Inf
   Inf   Inf   Inf   Inf
what are your suggestion? Thanks.

Best Answer

This is a singular matrix. No matter how badly you want to do so, you cannot invert a singular matrix. Not possible. Never will be. The laws of mathematics are simple in this respect. The inverse does not exist. You cannot form what does not exist.
At best, you can use pinv, to compute a pseudo-inverse. It is NOT an inverse. It does not have the properties of an inverse.
Related Question