[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Spline
From: |
Carlo de Falco |
Subject: |
Re: Spline |
Date: |
Thu, 15 Jan 2009 17:00:28 +0000 |
On 15/gen/09, at 11:15, dmelliott wrote:
Dear Help,
It is not clear to me whether the derivatives to be used in the
spline function are those at the ends of the old range or those to
be applied at the ends of the new range. Since the new domain and
the old can be quite different, this could cause problems.
Thanks
again
, dmelliott
I am not sure what you mean by "new range" and "old range" the help
text says:
If the length of Y is `N + 2',
then the first and last values of the vector Y are the values of
the first derivative of the cubic spline at the end-points.
which means that the piece-wise polynomial S(x) produced by 'spline'
is such that
S'(x(1)) = y(1)
S'(x(end)) = y(end)
c.
- Spline, dmelliott, 2009/01/15
- Re: Spline,
Carlo de Falco <=