integration over a circle VS rectangle

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madona sabri
madona sabri 2019-6-6
回答： Bjorn Gustavsson 2019-6-6
Capture11111.JPG
I have entered a function (fun), converted it to the polar domain (polarfun)
q0 is the function integration over a circle with radius 400um centered in the origin
q3 is the function integration over a square with dimensions 800*800 um*um
q3 is expected to be greater than q0 as the square has a greater area. However, the results are as shown!
what could be the mistake in my code?

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Bjorn Gustavsson
Bjorn Gustavsson 2019-6-6
Dont forget the basics:
dxdy = rdrdtheta
HTH

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