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From: <HIDDEN>
Newsgroups: comp.soft-sys.matlab
Subject: Re: What does character ~ mean in Matlab
Date: Wed, 27 Aug 2014 22:48:14 -0500
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On 8/27/2014 10:17 PM, Muna Shehan wrote:
> if ~isempty(input)
>    dx= A* x + B * u + b_ramp * input(t);
> else
>      dx = A*x + B*u ;
> end
>


http://www.mathworks.com/help/matlab/ref/not.html