Re: forcing polyfit through the origin

[Paul Kienzle]

You can modify the code for polyfit so that it does not
include the x^0 term.  Do this using:

 X = (x * ones (1, n)) .^ (ones (l, 1) * (1 : n));

instead of 

 X = (x * ones (1, n+1)) .^ (ones (l, 1) * (0 : n));

You will need to paste the zero term in when you are done:

  p = flipud ([ 0; p]);

Paul Kienzle
address@hidden

On Wed, Mar 20, 2002 at 11:43:18AM -0600, Martijn Brouwer wrote:
> 
> Hi,
> Is there a way to force polyfit to make the first coefficient zero so
> the polynomial goes through the origin?
> 
> Thanks,
> 
> Martijn Brouwer
> 
> 
> 
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Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
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