Integrating a 2D image plotting with non-uniform mesh(spacing)

Hi,

I'm trying to calculate the net power of the surface by integrating the Poynting vector of each grid, but since the grid size isn't uniform, it's impossible to just add them up and multiply the total area. Is it possible to integrate a 2D image plotting with non-uniform mesh(spacing)?

Many thanks!

Answer 1

[KSSV]

load('P_0_swg.mat')
x = lum.x ;
y = lum.y ;
Z = lum.z ;
[X,Y] = meshgrid(x,y) ; 

xi = linspace(min(x),max(x),200) ;
yi = linspace(min(y),max(y),200) ;
[Xi,Yi] = meshgrid(xi,yi) ;
Zi = griddata(X,Y,Z',Xi,Yi) ; 

pcolor(Xi,Yi,Zi)
shading interp 

[Aaron Huang]

Hi,

Thank you for replying, I'm thinking of is it possible to integrate the 2D plot and return a numerical number.

[KSSV]

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