Function invert_matrix

pub fn invert_matrix(matrix: &mut Array) -> Result<Array, Box<EvalAltResult>>

Calculates the inverse of a matrix. Fails if the matrix if not invertible, or if the elements of the matrix aren’t FLOAT or INT.

let x = [[ 1.0,  0.0,  2.0],
         [-1.0,  5.0,  0.0],
         [ 0.0,  3.0, -9.0]];
let x_inverted = inv(x);
assert_eq(x_inverted, [[0.8823529411764706,  -0.11764705882352941,   0.19607843137254902],
                       [0.17647058823529413,  0.17647058823529413,   0.0392156862745098 ],
                       [0.058823529411764705, 0.058823529411764705, -0.09803921568627451]]
);

let x = [[1, 2],
         [3, 4]];
let x_inverted = inv(x);
assert_eq(x_inverted, [[-2.0, 1.0],
                       [1.5, -0.5]]
);