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Re: [Help-gsl] b-spline evaluation

From: Rhys Ulerich
Subject: Re: [Help-gsl] b-spline evaluation
Date: Mon, 16 Jan 2012 10:53:52 -0600

Hi Iryna,

> I've tried to construct b-splines and evaluate them on the uniform knots. I
> become always the same error on the margins of the interval, over which the
> b-splines where constructed.

>    // construct five uniform knots {0, 1, 2, 3, 4}
>    gsl_bspline_knots_uniform(0, 4, w);

Are you mixing "knots" and "breakpoints"?  That method constructs
knots corresponding to uniform breakpoints on [0, 4].  The method name
is a bit confusing and specifying a basis differs from what you might
expect if you came from, say, Matlab.

- Rhys

P.S. The reference is at

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