MATLAB Answers

Translated by

このページのコンテンツは英語から自動翻訳されています。自動翻訳をオフにする場合は「<a class="turn_off_mt" href="#" onclick="window._kiq.push(['set', { 'event': 'Turn off MT' }]);">ここ</a>」をクリックしてください。

0

How can I differentiate my B-Splines?

Fabian Schaum さんによって質問されました 2016 年 8 月 27 日
最新アクティビティ Shruti Shivaramakrishnan さんによって 回答されました 2016 年 8 月 31 日
Trying to differentiate these B-Splines over [0,1], where n : order of b-spline, u : breaks.
I do not have the curve fitting toolbox and I have already tried to find something here/on stackexchange, but nothing seems to work. I'd appreciate help or explanation/ pointing out my mistakes or just plain code to make it work. Thanks!
function y = splines(u,n)
if n>2
y = ((u/(n-1)).*splines (u,n-1))+ (((n-u)/(n-1)).*splines(u-1,n-1));
else
y = zeros(size(u));
ind = find(u>0 & u<2) ;
y(ind) = 1 - abs(u(ind)-1);
end
end

  1 件のコメント

dpb
2016 年 8 月 27 日
If you define the coefficients properly(), couldn't you then just use *polyder for each segment?
() Same order as used by *polyfit and friends, that is...

サインイン to comment.

1 件の回答

回答者: Shruti Shivaramakrishnan 2016 年 8 月 31 日

A similar question has been answered on the following MATLAB Answers link :
https://www.mathworks.com/matlabcentral/answers/95194-how-do-i-find-the-derivative-of-a-spline-curve-in-matlab-7-9-r2009b
You could refer to the second part of the answer that describes the differentiation of a spline without using the curve-fitting toolbox.

  0 件のコメント

サインイン to comment.



Translated by