Computes the product of an array along a given dimension. The general syntax for its use is
y = prod(x,d)
where x is an n-dimensions array of numerical type.
The output is of the same numerical type as the input, except
for integer types, which are automatically promoted to int32.
The argument d is optional, and denotes the dimension along
which to take the product. The output is computed via
If
d is omitted, then the product is taken along the
first non-singleton dimension of x.
The following piece of code demonstrates various uses of the product function
--> A = [5,1,3;3,2,1;0,3,1]
A =
<int32> - size: [3 3]
Columns 1 to 3
5 1 3
3 2 1
0 3 1
We start by calling prod without a dimension argument, in which case it defaults to the first nonsingular dimension (in this case, along the columns or d = 1).
--> prod(A)
ans =
<int32> - size: [1 3]
Columns 1 to 3
0 6 3
Next, we take the product along the rows.
--> prod(A,2)
ans =
<int32> - size: [3 1]
Columns 1 to 1
15
6
0