Question

I would like to get an invertible matrix in Octave but as integers matrix, so:

x = [9,15;19,2];
inv(x)

Here I get:

[-0.0074906, 0.0561798; 0.0711610, -0.0337079]

but I would like to get [22,17;25,21]
anyone knows how to invert a matrix?

Answer 1

The inverse of each element is:

x .^ -1

Which results

0.1111    0.0667
0.0526    0.5000

Why you want to get [22,17;25,21]? What mathematical operation would yield such result?