
From:  Steven Davis 
Subject:  Re: Using fsolve to solve example problem from documentation gives very different result 
Date:  Wed, 14 Oct 2015 14:40:25 0500 
On Wed, Oct 14, 2015 at 12:40 PM, Steven Davis <address@hidden> wrote:Hi,I was trying to use fsolve to solve a system of equations, and couldn't get it to work. So I decided to try entering the example from the Octave documentation, Chapter 20 page 505. I figured once I got that to run I could work my way through to figure out what I was doing wrong. But I couldn't get fsolve to give the same result the documentation example said I should get!I entered into the editor and saved as f.m the following:function y=f(x)y=zeros(2,1);y(1)=2*x(1)^2+3*x(1)*x(2)+4*sin(x(2))6;y(2)=3*x(1)^22*x(1)*x(2)^2+3*cos(x(1))+4;endfunctionI then entered into the command window:[x,fval,info]=fsolve(@f,[1;2])According to the documentation I should get:x =0.579832.54621fval =5.7184e105.5460e10info = 1Instead I got:I tried a copy and past from here and it workedans = 1x =0.579832.54621fval =2.8991e084.9167e07info = 1>>So I think you have a different file named fsolve.m somewhere in your path.Doug
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