Re: Inverse Chebychev polynomials?
Re: Inverse Chebychev polynomials?
- Subject: Re: Inverse Chebychev polynomials?
- From: James McCartney <email@hidden>
- Date: Mon, 13 Dec 2004 16:18:43 -0800
the function chebft on this page from Numerical Recipes does what you
want:
http://www.library.cornell.edu/nr/bookcpdf/c5-8.pdf
On Dec 13, 2004, at 2:47 PM, Allan Hoeltje wrote:
Sorry if this sounds like a dumb question for this list but I am still
new
at dsp. I want to do wave shaping signal distortion using Chebychev
polynomials.
I am able to construc a wave shaping curve easy enough from the set of
polynomials defined by:
Let C[0] represent the 0th Chebychev polynomial, C[1] the 1st, and
C[n] the
nth, and so on. C[0] = 1; C[1] = x; and C[n] = 2xC[n-1] - C[n-2]; for x
in {-1...+1}
What I still need to do is go the other way: derive the polynomial for
a
given wave shape.
I have Googled for Inverse Chebychev (and Chebyshev) but have not
found any
formulas. Is there a way to derive an inverse Chebychev function?
-Allan
http://www.WholeCheese.com
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
40apple.com
This email sent to email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden