Path: news.mathworks.com!newsfeed-00.mathworks.com!solaris.cc.vt.edu!news.vt.edu!elk.ncren.net!newsflash.concordia.ca!canopus.cc.umanitoba.ca!not-for-mail From: Walter Roberson <roberson@hushmail.com> Newsgroups: comp.soft-sys.matlab Subject: Re: Triangulation with only a radius Date: Tue, 23 Mar 2010 07:09:52 -0500 Organization: The University of Manitoba Lines: 22 Message-ID: <hoab2i$aqu$1@canopus.cc.umanitoba.ca> References: <hoa066$o9k$1@fred.mathworks.com> NNTP-Posting-Host: ssh.ibd.nrc.ca Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: canopus.cc.umanitoba.ca 1269346194 11102 132.246.132.10 (23 Mar 2010 12:09:54 GMT) X-Complaints-To: abuse@cc.umanitoba.ca NNTP-Posting-Date: Tue, 23 Mar 2010 12:09:54 +0000 (UTC) User-Agent: Thunderbird 2.0.0.24 (Macintosh/20100228) In-Reply-To: <hoa066$o9k$1@fred.mathworks.com> Xref: news.mathworks.com comp.soft-sys.matlab:619324 Ben wrote: > I am doing a project for one of my classes and I am now stuck at the > implementation of a triangulation algorithm. I have to find a point of > intersection for three circles with only a radius and an unknown scaling > factor. The device only returns a signal strength value. > > I can manually change the scaling factor until the three circles barely > overlap and it is very obvious where the minimum intersection point > would be but I can't figure out where it is using Matlab. I notice you say that you can change the scaling factor, singular, rather than the scaling factors, plural, so is it correct that the scaling factor is the same for all three circles? And is it also correct that all three circles have the same radius and that the scaling factor works the same way on all three of them? And is it also correct that you do not know where the origins of the three circles are? Since you say that all you have is a radius and scaling factor and signal strength feedback? I must admit that I am having difficulty picturing what kind of real-life situation that this is modeling.