How to plot a best fit curve to my data points?
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Hi,
I have attached a data (inverted_qp.mat Inv_qpAVO freq;) and a plot between fre and Inv_qpAVO is shown below in red color.
circled points on left hand side are the issue and I want to a best-fit curves passes through these points just like shown on the right hand side figure (in blue color a solid line).
The best fit curve should start from the fist point to the end point as given a solid blue line. Thanks
7 Commenti
John D'Errico
il 3 Giu 2022
Modificato: John D'Errico
il 3 Giu 2022
@Nisar Ahmed Please stop using a new answer every time you want to make a comment.
Sam Chak
il 3 Giu 2022
@Image Analyst, thanks for the insights into the analysis of the data that provides a basis for understanding the curve fitting. 👍
Risposte (2)
Kevin Holly
il 2 Giu 2022
If you have the Curve Fitting Toolbox, you can use the Curve Fitting app after you import your data into the workspace. Within the app, there are many curve fits you could select from. Here is a video showing the process.
1 Commento
John D'Errico
il 3 Giu 2022
<Moved to a comment from @Nisar Ahmed
Nisar Ahmed
il 3 Giu 2022
1 Commento
Torsten
il 3 Giu 2022
Modificato: Torsten
il 3 Giu 2022
p(1) = -0.137921750658333;
p(2) = 4.83156544429652E-5;
p(3) = -3.87422699831525E-7;
p(4) = 0.000904269701487609;
p(5) = 0.138139976684668;
p(6) = -0.000327312583052385;
f = @(x)p(1) + p(2)*x + p(3)*x.^1.5 + p(4).*log(x) + p(5).*exp(p(6).*x);
plot(x,f(x))
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