ones (Matlab function)

Create an array of all ones

Matlab/Scilab equivalent

Matlab Scilab

`ones`_

`ones`_

Particular cases

Note that in Matlab, A can contain complex values (in these cases, only real part of A is taken in account), what Scilab function do not tolerate.

// Scilab version
B=`ones`_(A)

Most differences stem from the use of ones in conjunction with size. In Scilab you do not need to use size:

% Matlab version
A = [1 2; 3 4];
B = `ones`_(`size`_(A))
B  = [ 1. 1. ; 1. 1.]

// Scilab version
A = [1 2; 3 4];
B = `ones`_(A)
B  =[ 1 1; 1 1]

As a result, if A is a scalar, then Matlab will return a A*A matrix of ones but in Scilab you get a 1 (just because a scalar is a 1*1 matrix), so use ones(A,A) to get the same matrix B. If A is a vector, Scilab and Matlab give the same B. Finally, if A is a matrix, in Scilab, B will be a matrix having the same size as A whereas in Matlab, you get an error message.

Examples

Matlab Scilab

B = `ones`_(2)
B = [1,1;1,1]
B = `ones`_(2,2)
B = [1,1;1,1]
B = `ones`_([3,3])
B = [1,1,1;1,1,1;1,1,1]

B = `ones`_(2)
B = 1
B = `ones`_(2,2)
B = [1,1;1,1]
B = `ones`_([3,3])
B = [1,1]