Curve smoothing / fitting

Hi guys,

I need your help again.

how can i smooth or fitting my curve?

Many Thanks

Answer 1

[the cyclist]

Do you mean you want a smooth line that goes through all the points? You could fit a spline:

% Set seed for reproducibility
rng default

% The data
x = 1:6;
y = rand(size(x));

% Fit a spline
xq = 1:0.1:6;
s = spline(x,y,xq);

% Plot
figure
plot(x,y,"ko",xq,s,"r--")

If you mean you want to fit some functional form (like maybe a square wave?) to the data, you'll need to give us more info. Also, uploading the data will help.

[Latifa Bouguessaa]

hello sir,

I have uploaded the pictures and my code. i wanted that

signal nps smooth / fitting. This program is about calculating the noise power spectrum of the CT images.

many greetings your Latifa

[the cyclist]

Unfortunately, I can't run your code, because I don't have the Image Processing Toolbox.

[Latifa Bouguessaa]

:-(