From: Eric Durant <edurant@umich.edu>
Subject: Name hiding bug with subs() in Symbolic Toolbox
Date: 21 Jun 2000 00:00:00 GMT
Message-ID: <39510837.C19B0111@umich.edu>
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I'm also reporting this to The MathWorks, but thought readers of this
group might be interested.  There seems to be a name hiding bug in
toolbox/symbolic/@sym/subs.m in Matlab 5.3.1.29215a (R11.1) [tested on
both SunOS 5.6 and PCWIN versions].  The variable "r" is used internally
and cannot be left as a free variable when calling subs().  Here is the
minimal (I think) code that reproduces the bug:

clear all
syms r b
subs(r+b, b, 1) % Generates warning and [] as answer

clear all
syms s b
subs(s+b, b, 1) % Generates expected answer

-- Eric Durant
   http://www.edurant.com/