Re: chebyshev transform routines

[Kamaraju S Kusumanchi]

Jordi Gutierrez Hermoso wrote:

> On 16/06/07, Kamaraju S Kusumanchi <address@hidden> wrote:
>> Are there any functions available in Octave for performing chebyshev
>> transforms?
> 
> Is the Chebyshev transform the same thing as the Chebyshev series?

I was referring to the following.

U(x_j) = \sum_{k=0}^N ( Uhat(k) * T_k(x_j) )

where x_j for j=0:N are usually given by cos(pi*j/N). The reverse transform
is defined accordingly.

Currently, I am doing it by explicit matrix multiplications. You can also do
the transform efficiently by using fftws. I was asking if octave provides a
way to perform these transforms using fftw routines.

thanks
raju

-- 
Kamaraju S Kusumanchi
http://www.people.cornell.edu/pages/kk288/
http://malayamaarutham.blogspot.com/