Single extension not everywhere?

According to the following page, MATLAB 2019a should have automatic singleton extension:

https://blogs.mathworks.com/loren/2016/10/24/matlab-arithmetic-expands-in-r2016b

My tests show that this is not always true:

% A test array
>> x=false(3,3)

  3×3 logical array
   0   0   0
   0   0   0
   0   0   0

% Singleton extension works
>> x([1 3],2)=true

  3×3 logical array
   0   1   0
   0   0   0
   0   1   0

% Singleton extension doesn't work
>> x([1 3],2:3)=[true true]

Unable to perform assignment because the size of the left
side is 2-by-2 and the size of the right side is 1-by-2.

Answer 1

[Paul]

The linked blog post does not show assignment (=) included uder "Supported Operators and Functions." It still isn't:

doc bsxfun

[FM]

OK, thanks. I will code around its absence. Pity, it would streamline the code.