Performance of B spline package's "spcol" near the boundary

6 次查看（过去 30 天）
Evan Scope Crafts
Evan Scope Crafts 2020-11-21
I am working on a project where I am attempting to fit data that lies at evenly spaced locations, i.e. , using cubic B-splines. To do this, I am using the built in Matlab function "optknt" to create the knot vector, and then examining the resulting matrix A formed by "spcol". The knot vector generated by "optknt" has four knots at , and four knots at . Examining the Cox-De-Boor recurison relationship as defined, e.g. here - https://en.wikipedia.org/wiki/De_Boor%27s_algorithm, it seems as if the B-splines will be uniformly 0, as $N$ does not satisfy for any i, where t is the knot vector. Thus, it seems that the last row of A should be a zero vector. However, when A is computed using "spcol". Why is this?

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Spline Postprocessing 的更多信息

标签

产品


版本

R2018a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by