ONES Array of Ones

Section: Array Generation and Manipulations

Usage

Creates an array of ones of the specified size. Two seperate syntaxes are possible. The first syntax specifies the array dimensions as a sequence of scalar dimensions: 
   y = ones(d1,d2,...,dn).

The resulting array has the given dimensions, and is filled with all ones. The type of y is float, a 32-bit floating point array. To get arrays of other types, use the typecast functions (e.g., uint8, int8, etc.). The second syntax specifies the array dimensions as a vector, where each element in the vector specifies a dimension length: 

   y = ones([d1,d2,...,dn]).

This syntax is more convenient for calling ones using a variable for the argument. In both cases, specifying only one dimension results in a square matrix output.

Example

The following examples demonstrate generation of some arrays of ones using the first form. 
--> ones(2,3,2)

ans = 

(:,:,1) = 
 1 1 1 
 1 1 1 

(:,:,2) = 
 1 1 1 
 1 1 1 

--> ones(1,3)

ans = 
 1 1 1

The same expressions, using the second form. 

--> ones([2,6])

ans = 
 1 1 1 1 1 1 
 1 1 1 1 1 1 

--> ones([1,3])

ans = 
 1 1 1

Finally, an example of using the type casting function uint16 to generate an array of 16-bit unsigned integers with a value of 1. 

--> uint16(ones(3))

ans = 
 1 1 1 
 1 1 1 
 1 1 1