`true` — Create logical arrays filled with true values.

true creates logical arrays filled with true values. RunMat mirrors MATLAB sizing semantics across scalar, vector, matrix, and N-D forms.

How does the `true` function behave in MATLAB / RunMat?

true() returns the scalar logical true.
true(n) returns an n x n logical array of true values.
true(m, n, ...) returns a logical array with the requested dimensions.
true(sz) accepts a size vector (row or column) and returns an array with prod(sz) elements arranged using MATLAB column-major ordering.
true(A) returns a logical array of true with the same size as A.
true(___, 'like', prototype) uses the prototype only for sizing; the result is still a host logical array.
true(___, 'logical') is accepted for MATLAB compatibility and has no effect.

mask = true(2, 3)

Expected output:

mask = [1 1 1; 1 1 1]

dims = [2 1 3];
mask = true(dims)

Expected output:

mask =
  2x1x3 logical array
     1
     1
     1
     1
     1
     1

A = rand(3, 2);
mask = true(A)

Expected output:

mask =
  3x2 logical array
     1     1
     1     1
     1     1

It returns the logical scalar true.

Yes. true(n) returns an n x n logical array of true values, matching MATLAB behavior.

A row or column vector is treated as the full set of dimensions, so true([2 3 4]) yields a 2x3x4 logical array.

No. The builtin always returns a host logical array. gpuArray inputs are only used to infer the output size.

No. true always returns logical values; the 'logical' option is accepted only for MATLAB compatibility.