reshape

• .reshape(r, c) : Reshapes the matrix to (r × c) without changing the total number of elements.
• .reshape(r0, c0, r1, c1) :
• .hstack(...matrices: Matrix[]) : Horizontally stacks matrices by columns (same number of rows required).
• .vstack(...matrices: Matrix[]) : Vertically stacks matrices by rows (same number of columns required).
• .hqueue(...matrices: Matrix[]) : Appends matrices horizontally, preserving row order (row-wise concatenation).
• .vqueue(...matrices: Matrix[]) : Appends matrices vertically, preserving column order (column-wise concatenation).