Path: news.mathworks.com!not-for-mail From: <HIDDEN> Newsgroups: comp.soft-sys.matlab Subject: Re: New to Matlab- Need to evaluate 1 eqn in 2 var Date: Tue, 23 Dec 2008 21:01:20 +0000 (UTC) Organization: Concordia University Lines: 15 Message-ID: <girjj0$hkc$1@fred.mathworks.com> References: <girgbb$j74$1@fred.mathworks.com> <giricv$1f6$1@fred.mathworks.com> Reply-To: <HIDDEN> NNTP-Posting-Host: webapp-02-blr.mathworks.com Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 8bit X-Trace: fred.mathworks.com 1230066080 18060 172.30.248.37 (23 Dec 2008 21:01:20 GMT) X-Complaints-To: news@mathworks.com NNTP-Posting-Date: Tue, 23 Dec 2008 21:01:20 +0000 (UTC) X-Newsreader: MATLAB Central Newsreader 1648595 Xref: news.mathworks.com comp.soft-sys.matlab:508563 It's actually an equation to simulate a PV panel output, anyway if it can be solved as one of them as a function of the other, i think it will work out, but can we do that? how it's possible to separate the two variables anyway. Thanks for your help "Roger Stafford" <ellieandrogerxyzzy@mindspring.com.invalid> wrote in message <giricv$1f6$1@fred.mathworks.com>... > "Abdalla Mohamed" <mangawy_21@hotmail.com> wrote in message <girgbb$j74$1@fred.mathworks.com>... > \> ...... > > I am having a problem evaluating the following equation to get I and V where all the other terms are known. > > I= (i1)-(i2)*exp((V+I)/N)- ((V+I)/M) > > ....... > > With two unknowns, one equation is not enough to determine them. There are infinitely many combinations of I and V that would satisfy this one equation. I have the feeling this isn't really what you meant. Perhaps you want to find one of them as a function of the other? > > Roger Stafford