Which Gaussian fitting tool should I use?
4 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Asser Abdelgawad
le 31 Mai 2022
Commenté : Asser Abdelgawad
le 6 Juin 2022
I used a gaussian fitting function that generated this result. Surely this graph can look more gaussian rather than parabolic?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1017690/image.png)
I also tried using fit() from the curve fitting toolbox which gave me a straight line. What could be going wrong?
Here is the data:
% x
Columns 1 through 8
-16 -15 -14 -13 -12 -11 -10 -9
Columns 9 through 16
-8 -7 -6 -5 -4 -3 -2 -1
Columns 17 through 24
0 1 2 3 4 5 6 7
Columns 25 through 32
8 9 10 11 12 13 14 15
% y
Columns 1 through 8
79 85 87 84 77 92 84 88
Columns 9 through 16
93 88 90 98 99 133 164 183
Columns 17 through 24
180 134 107 92 86 85 85 79
Columns 25 through 32
94 85 90 82 93 83 102 8
4 commentaires
Matt J
le 1 Juin 2022
@Asser Abdelgawad You have provided the data, but in a form that is not easily retrieved or copy-pasted. Ideally, you would attach the x,y data in a .mat file.
Réponse acceptée
Plus de réponses (2)
Image Analyst
le 1 Juin 2022
Modifié(e) : Image Analyst
le 1 Juin 2022
Why are you trying to fit a Gaussian to the Line Spread Function? LSFs are commonly sinc functions - yours even looks like one. Seems like you should use fminsearch to find the best fit sinc function.
3 commentaires
Image Analyst
le 1 Juin 2022
You're not getting the PSF. I don't see any code for that.
Voir également
Catégories
En savoir plus sur Get Started with Curve Fitting Toolbox dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!