[Octave-bug-tracker] [bug #55622] for loop does not run over a matrix with colums but no row

[Kai Torben Ohlhus]

Follow-up Comment #21, bug #55622 (project octave):

Regarding comment #20.  Please fix your confusion with a cup of coffee
☕🙂

Your code cannot be run, as there is a confusion between "y" and "loop_var". 
Clear your workspace "clear all" and start again.


loop_var = ones(3,1)
isempty(loop_var)
size(loop_var)
for var = loop_var, disp('hey'), disp(var), end


Second all this discussion is about "ones(0,3)", NOT "ones(3,1)" or alike.  As
Rik said, please read again carefully.  Your code of course works nicely with
a single loop iteration in both Octave and Matlab, as the column count is
"1".

No bugfixes by Matlab R2019a and R2020b yet.


>> for i = (3:2)', disp ('hey'), end
hey
>> for i = zeros (0,3), disp ('hey'), end
hey
hey
hey
>> for i = zeros (0, 3, 0), i, end
>> for i = ones (0,3), disp ('hey'), end 
hey
hey
hey
>> for i = ones (3,0), disp ('hey'), end


I favor Riks opinion on this item too and suggest to close it as won't fix.


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