How to plot a Gaussian 2d of grayscale image

I'm beginner in Matlab programming and I'm try to find a peak in grayscale image using gaussian fit.

I was trying this function: https://www.mathworks.com/matlabcentral/fileexchange/55033-fit-1d-and-2d-gaussian-to-noisy-data

but no luck; Is there any preprocessing image before applying this function.

Answer 1

[Ameer Hamza]

If you directly want to create an image matrix, the try something like this

[X, Y] = meshgrid(-3:0.01:3);
Z = exp(-X.^2-Y.^2);

Z = rescale(Z, 0, 1);
imshow(Z)

[Alan David]

Thanks Ameer,

I have an image already but in the function they mention the input as:

% x0 = [Amp,x0,wx,y0,wy,theta]: Inital guess parameters.

% x = [Amp,x0,wx,y0,wy,theta]: simulated gaussian parameters.

how to get these parameters from my image?

[Ameer Hamza]

Can you show the image?