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From: "Niklas " <nn@hotmail.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: ismember - getting wrong result
Date: Sun, 15 Mar 2009 23:58:01 +0000 (UTC)
Organization: Lunds Universitet
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try linspace. it works for me:

a=linspace(0,1,11)
[b,c]=ismember(0.3,a)


Answer:
b =
     1
c =
     4