[Matlab] Gaussian Distribution

$G(x,y)=\frac{1}{2\pi {\sigma }_x{\sigma }_y}{\exp }^{-(\frac{x^2}{2{\sigma }_x^2}+\frac{y^2}{2{\sigma }_y^2})}$

function gaussian(sigma_x, sigma_y)
x = -4:0.1:4;
y = -4:0.1:4;
[x, y] = meshgrid(x, y);
z = exp(-(x.^2 / 2 * sigma_x^2 + y.^2 / 2 * sigma_y^2)) / (2 * pi * sigma_x * sigma_y);
mesh(x, y, z)
end

x축, y축 표준편차가 각각 1, 1

 

x축, y축 표준편차가 각각 1/2, 1/2

x축, y축 표준편차가 각각 1, 2