Computer Lecture 6

************************************************************************************************************************************
Prod function this function returns the product of an array elements.
1. B = prod(A) returns the product of the array elements of A.
• If A is a vector, then prod(A) returns the product of the elements.
• If A is a nonempty matrix, then prod(A) treats the columns of A as vectors and returns a row vector of the products of each column.
• If A is an empty 0-by-0 matrix, prod(A) returns 1.

Example
>> A=[1:3:7;2:3:8;3:3:9]
A = 3×3

1 4 7
2 5 8
3 6 9

>> B = prod(A)
B = 1×3

6 120 504

2. B = prod(A,dim) returns the products along dimension dim. For example, if A is a matrix, prod(A,2) is a column vector containing the products of each row.
Example
>> dim = 2;
>> B = prod(A,dim)
B = 3×1

28
80
162


Comprod function this function returns the cumulative product of an array elements.
1. B = cumprod(A) returns the cumulative product of A starting at the beginning of the first array dimension in A whose size does not equal 1.
************************************************************************************************************************************