fit scatter plot to a curve

Question

Tesla 2022-5-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1726115-fit-scatter-plot-to-a-curve

评论： Tesla 2022-5-24

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

I want to fint those scatter points to a curve.

I tried using lsline but seems not working, i tried also with polyfit.

here my small code

clc, clear all;
x = [0,0.1, 0.2, 0.3, 0.4, 0.46, 0.55, 0.6];
y =[0, 0.0982,	0.1359,	0.126,	0.0778,	0.0827,	0.063,	0.0599];
% f= polyfit(y,x,7)
% xx = linspace(min(x), max(x));
% %xx = 0:0.1:2.5;  %%%%%%%%%%%%%%%%%%%%%%
% v = polyval(f, xx); %%%%%%%%%%%%%%%%%%%
% plot(x,y,'o', xx,v,'-')
plot (x,y)
lsline

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Answer 1

Walter Roberson 2022-5-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1726115-fit-scatter-plot-to-a-curve#answer_970600

在 MATLAB Online 中打开

x = [0,0.1, 0.2, 0.3, 0.4, 0.46, 0.55, 0.6];
y =[0, 0.0982,  0.1359,  0.126,  0.0778,  0.0827,  0.063,  0.0599];
f= polyfit(x,y,7)
xx = linspace(min(x), max(x));
v = polyval(f, xx);
plot(x,y,'o', xx,v,'-')