MATLAB Answers

How do I fit a Sinuscurve to my Data-Function, WITHOUT Cftool?

9 views (last 30 days)
BrunoChemie on 16 Apr 2021 at 8:00
Answered: Star Strider on 16 Apr 2021 at 12:24
C = dlmread('Spektra_Spektrometer2_p.txt.','\t','A3..B652');
x1= C(:,1);
y1= C(:,2);
[fitresult,gof]= sinFit(x1,y1);
i am Missing this. How do I get those numbers that define the Sinusfit
spek2 = dlmread('Spektra_Spektrometer2_p.txt','\t','A3..B652');
x1 = spek2(:,1);
y1 = spek2(:,2);
[fitresult,gof]= sinFit(x1,y1);
phi = -348.3; %how do i get this??
yfit = -0.28*sin(0.016*x1+phi)+1.284; %how to i get this??

Answers (1)

Star Strider
Star Strider on 16 Apr 2021 at 12:24
See if the approach in Curve fitting to a sinusoidal function will do what you want. It uses only core MATLAB functions, no toolboxes.


Community Treasure Hunt

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

Start Hunting!