Possible DrawFormattedText bug?

1
This is an odd one, but I've encountered a situation in which it appears that DrawFormattedText either works or doesn't, depending solely on whether its output arguments are requested or not.

This is MATLAB 2013a on a MacBook Pro, Mountain Lion (OS X 10.8), PTB 3.0.11 .


Attached is the code that will reproduce the bug. just run triangleTest_bugReport. Two calls are made to DrawFormattedText, with the only difference being that in one case, the output arguments are requested as [~,~,~]. If the output is requested, the text draws correctly. If it is not, the text disappears and it appears as though the function has decided not to try (outputs a 0).

Restarting MATLAB, 'clear all', and other such initializing tricks do not appear to change matters.
I do not have access to another machine and will be delighted if someone on a different OS and/or same OS but different box could tell me if it reproduces for them.



Alik Widge, MD, PhD
Research Fellow, Division of Neurotherapeutics
MGH Psychiatry
awidge@...
206-866-5435


2
There we go -- that's the trick. Until you explained this, I couldn't comprehend some of the stuff at the bottom of 'doc DrawFormattedText'. Going back and rereading it fresh this AM, it does indeed describe exactly the behavior you mention (and I didn't consider requesting only *two* output arguments as a test).

Thanks!