addToM method
Adds matr2 to matr1 and returns the modified matr1. The matrices must have the same number of rows and colmuns.
Implementation
static List<Float64List> addToM(List<Float64List> matr1, List<Float64List> matr2) {
for (int i = 0; i < matr1.length; i++) {
for (int k = 0; k < matr1[0].length; k++) {
matr1[i][k] += matr2[i][k];
}
}
return matr1;
}