Initializes a zero matrix.
The number of rows or (if the cols parameter is blank) the number of rows or columns (the size)
Optional
The number of columns
const result = Chalkboard.matr.zero(2, 3); // Returns a 2-by-3 zero matrix Copy
const result = Chalkboard.matr.zero(2, 3); // Returns a 2-by-3 zero matrix
Initializes a zero matrix.