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 = 
  <float>  - size: [2 3 2]
(:,:,1) = 
 
Columns 1 to 3
 1  1  1  
 1  1  1  
(:,:,2) = 
 
Columns 1 to 3
 1  1  1  
 1  1  1  
--> ones(1,3)
ans = 
  <float>  - size: [1 3]
 
Columns 1 to 3
 1  1  1  

The same expressions, using the second form.

--> ones([2,6])
ans = 
  <float>  - size: [2 6]
 
Columns 1 to 6
 1  1  1  1  1  1  
 1  1  1  1  1  1  
--> ones([1,3])
ans = 
  <float>  - size: [1 3]
 
Columns 1 to 3
 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 = 
  <uint16>  - size: [3 3]
 
Columns 1 to 3
 1  1  1  
 1  1  1  
 1  1  1