I have encountered a problem and would like to ask everyone to help solve it. The problem to be solved is how to close the following two fitted curves. Thank you very much for your enthusiastic answers.

Question

Wesley 2021-1-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/721839-i-have-encountered-a-problem-and-would-like-to-ask-everyone-to-help-solve-it-the-problem-to-be-solv

回答： KSSV 2021-1-20

采纳的回答： KSSV

在 MATLAB Online 中打开

My code:

load dataA.mat
%x1=dataA(:,1);
%y1=dataA(:,2);
f1 = fit(xAbove,yAbove,'smoothingspline','SmoothingParam',0.0001);%smoothingspline
%plot(f1,xAbove,yAbove)
plot(f1,'-r')
hold on
load dataB.mat
%x2=dataB(:,1);
%y2=dataB(:,2);
[xx,ind] = sort(xBelow);
yy2 = smooth(xBelow,yBelow,0.5,'rloess');
yy=yy2(ind);
xAbove(1)==xx(1);
yAbove(1)==yy(1);
plot(xx,yy,'r-')

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Answer 1

KSSV 2021-1-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/721839-i-have-encountered-a-problem-and-would-like-to-ask-everyone-to-help-solve-it-the-problem-to-be-solv#answer_601839

在 MATLAB Online 中打开

load dataA.mat
%x1=dataA(:,1);
%y1=dataA(:,2);
f1 = fit(xAbove,yAbove,'smoothingspline','SmoothingParam',0.0001);%smoothingspline
%plot(f1,xAbove,yAbove)
% plot(f1,'-r')
xx1 = xAbove ;
yy1 = f1(xx1) ; 
hold on
load dataB.mat
%x2=dataB(:,1);
%y2=dataB(:,2);
[xx,ind] = sort(xBelow);
yy2 = smooth(xBelow,yBelow,0.5,'rloess');
yy=yy2(ind);
xAbove(1)=xx(1);
yAbove(1)=yy(1);
xx = [xx1 ; flipud(xx) ; xx1(1)] ;
yy = [yy1 ; flipud(yy); yy1(1)] ; 
plot(xx,yy,'r-')