From help-request at octave dot org Mon Feb  7 22:06:35 2005
Subject: Re: 2 linear eq
From: miguel manese <jjonphl at gmail dot com>
To: shih lin <shlinlin at 37 dot com>
Cc: help at octave dot org
Date: Tue, 8 Feb 2005 12:11:07 +0800

I am not an elite in this group so I can't flame you to hell, but this
is ridiculous. Your function f should read

function z = f(x)
    z = [8*x(1)+x(2)+29, 8*x(1)-x(2)+19];
endfunction



On Mon, 7 Feb 2005 19:27:49 -0800, shih lin <shlinlin at 37 dot com> wrote:
> to solve  8x + y =-29
> 8x - y = -19
> 
> I do
> 
> >> function z=f(x)
>   z=[8*x(1)+x(2)=-29, 8*x(1)-x(2)=-19];
>    endfunction
> >> fsolve("f",[0,0])
> error: invalid lvalue function called in expression
> error: evaluating assignment expression near line 2, column 17
> error: evaluating assignment expression near line 2, column 4
> error: called from `f'
> error: fsolve: evaluation of user-supplied function failed
> >>
> I am in GNU Octave, version 2.1.42 (i686-pc-cygwin), if anyone can point how to
> upgrade I am highly appreciate(I get it just follow download website's
> instruction)
> 
> eric
> 
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> 
>



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