Find all combinations of entries in a matrix (or vector) which sum equals a certain number. In addition to the matrix, the length of the combination (two entries, three entries, ...) as well as the numerical value to match can be supplied. Works as well on vectors.
Returns the combination and the indices of the combinations.
Since it uses brute force to try all possible combinations the time strongly depends on the size of the matrix and the length of the combination.
Added floating point precision, progress should not decrease due to the polynom behind it