Hello everyone, how to write the code to calculate the similarity coefficient of two curves?Another problem is that when fitting a curve, the interval of a curve x is [-3,3], and it will exceed this interval when fitting a curve. I don’t know where t

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Wesley 2021-1-11

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https://ww2.mathworks.cn/matlabcentral/answers/713618-hello-everyone-how-to-write-the-code-to-calculate-the-similarity-coefficient-of-two-curves-another

评论： Wesley 2021-1-11

code:

load jizuobiao1.mat
f1= fit(THETA11,RHO11,'smoothingspline','SmoothingParam',0.99);%smoothingspline
plot(f1,THETA11,RHO11)
load jizuobiao2.mat
f2 = fit(THETA12,RHO12,'smoothingspline','SmoothingParam',0.99);%smoothingspline
plot(f2,THETA12,RHO12)

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Answer 1

KSSV 2021-1-11

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在 MATLAB Online 中打开

load jizuobiao1.mat
RHO11 = XX1 ; 
THETA11 = linspace(-pi,+pi,length(RHO11))' ; 
f1= fit(THETA11,RHO11,'smoothingspline','SmoothingParam',0.99);%smoothingspline
load jizuobiao2.mat
RHO12 = XX3 ; 
THETA12 = linspace(-pi,+pi,length(RHO12))' ; 
f2 = fit(THETA12,RHO12,'smoothingspline','SmoothingParam',0.99);%smoothingspline
%% 
x = THETA11 ; 
y1 = f1(x) ;
y2 = f2(x) ;
plotregression(y1,y2)
plot(x,y1,'r',x,y2,'b')

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KSSV 2021-1-11

I have taken THETA11 and THETA12 to lie between (-pi,+pi), in your code you have not defined them. You have the code in hand, you can extend it to your input values.

Wesley 2021-1-11