Size function in MATLAB

Ize: gets the number of rows and columns of the array.
(1) S = size (a). When there is only one output parameter, a row vector is returned. The first element of the row vector is the number of rows in the group, and the second element is the number of columns in the array.
(2) [R, C] = size (a). When two output parameters exist, the size function returns the number of rows in the array to the first output variable, returns the number of columns in the array to the second output variable.
(3) If you add another item to the input parameter of the size function and assign the value to the item with 1 or 2, the size will return the number of rows or columns of the array. Where R = size (A, 1) number of rows in group A returned by the statement, and c = size (A, 2) Number of columns in group A returned by the statement.