Could you help me Find intersection between spline and polyfit

6 次查看（过去 30 天）
Peter
Peter 2012-3-18
Hello everybody, please can somebody help me? I have spline and polynomial curve of degree one. These two curves intersect (I mean spline and polyfit). CAN YOU HELP ME HOW TO FIND POINT OF INTERSECTION (Coordinates)???? Example of my spline and polyfit.
xx1 = start:0.1:end;
yy1 = spline (points(:,1),points(:,2),xx1);
% plot(points(:,1),points(:,2),'bo',xx1,yy1,'b', 'LineWidth', 2);
plot(xx1,yy1,'b', 'LineWidth', 2);
pol11 = polyfit(K1,K2,1);
s11 = start1:0.1:end1;
ss11 = polyval(pol11,s11);
plot(s11,ss11,'r','Linewidth',2)
This is only part of my code. Thanks everybody for any help!!!!!

请先登录，再回答此问题。

采纳的回答

John D'Errico
John D'Errico 2012-3-18
Use fzero. Or roots, if you have the chops. Note that a polynomial segment is just a cubic. Subtracting the two functions and setting the result to zero must give an intersection.

更多回答（0 个）

类别

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

标签

Community Treasure Hunt

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

Start Hunting!

Translated by