Re: Polynomial interpolation

[Tatsuro MATSUOKA]

----- Original Message -----

>From: Ariana del Tor
>To: Cinthia Mesquita Pinke Cavalcanti
>Cc: "help
>Date: 2015/6/23, Tue 09:22
>Subject: Re: Polynomial interpolation
> 
>
>http://www.mathworks.com/help/matlab/ref/polyfit.html
>
>Please see the first example. You need to feed polyfit two vectors, x and y of 
>the same size. 
>
>
>so define x and y separately in your case it looks like:
>
>
> x = [1, 2, 3, 4, ....]
>y = [ 73, 99, 90, 24...]
>
>
>
>and finally n is the number of points you want to fit the array to. n can 
>equal up to # of point - 1.
>
>
>On Mon, Jun 22, 2015 at 1:15 PM, Cinthia Mesquita Pinke Cavalcanti 
><address@hidden> wrote:
>
>Dear Sir/ Madam
>> 
>>I am new to Octave, and I was not able to work with the polyfit function.
>>I have the matrix listed below and I want to find  the polynomial 
>>coefficients that fit to the points x,y:
>> 
>> 
>>What should I do?
>> 
>>Thanks in advance,
>> 
>> 
>>Cínthia Pinke
>> 
>Ariana del Toro
>DATA ANALYST
>address@hidden



Note

polyfit is not a function for polynomial interpolation but a function of 
polynomial curve fitting.

Wiki
polynomial interpolation

https://en.wikipedia.org/wiki/Polynomial_interpolation


Curve fitting

https://en.wikipedia.org/?title=Curve_fitting


Tatsuro