RE: feval & leasqr.m

[Harbinson, Jeremy]

Hi,
The function name which you type in quotes refers to file (I think it must be 
an 'm' file) in which your function is actually described. For example, I have 
a collection of function files in a directory, one of which is SGL_EXP.M, this 
file contains a function in a form which is comprehensible to Octave. 


function y=SGL_EXP_1(x,p)
% MODEL FOR SINGLE EXP DECAY WITH OFFSET
y=p(1)+p(2)*exp(-p(3)*x);
return

In the case of this particular function it is a single exponential decay with 
an offset. The function expects to get x values and three parameters in a three 
element vector (p(1), p(2) and p(3)) whose values it will attempt to estimate 
given initial guesses.
Hope this helps,
Jeremy Harbinson


-----Original Message-----
From:   address@hidden [mailto:address@hidden
Sent:   Mon 4/18/2005 8:36 PM
To:     address@hidden
Cc:     
Subject:        feval & leasqr.m

Hello,

I have got a problem with the leasqr.m and probably I'm trying to solve still
the same wrong way,

according to the instructions in the leasqr.m macro 

F=name of function in quotes, of the form y=f(x,p)

I set F to

F="y=x+p" (for testing the macro)

After running the macro I get a set of error messages that this is not a valid
function. What's wrong?

Thanks,

Hana.

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Octave is freely available under the terms of the GNU GPL.

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How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
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