# Thread: matrix singular values and inverse

1. ## matrix singular values and inverse

Hi guys.
I need help finding the singular values of this matrix.

A = | 0.3 0.2 0.1 |
| 0.3 0.4 0.25|
| 0.25 0.43 0.5 |

I also need to find the inverse of the [I-A] matrix. I is the identity matrix.
Only need the final values.

By the way is there any mathematical program that I can use to calculate that. Thanks for your help.

2. I think you can try to use MATLAB, it has nice build-in routines especially for linear (matrix) algebra. I just used its build-in function “svd” to find the answers to your question. The singular values of this matrix are: $\displaystyle 0.9469,\; 0.2220$ and $\displaystyle 0.0626$.
We can also use the build-in function “inv” to find the inverse of a given matrix. The inverse to your question is
$\displaystyle \begin{bmatrix}2.9915 &2.2222& 1.7094\\3.3023&5.0505&3.1857\\4.3357&5.4545& 5.5944\end{bmatrix}$
You might following links are useful:

MATLAB (svd)

MATLAB (inv)

Roy

3. Thanks for your help roy.