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How do I plot a double integral ?

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Robin Stöhr
Robin Stöhr 2017-12-11
回答： SRIHARSHA CHINTA 2020-12-16
I need to plot this function. Can anybody help me?

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Chris Perkins
Chris Perkins 2017-12-14
Hi Robin,
To calculate a definite double integral in MATLAB, you can use the function "integral2", which is described on the following documentation page: https://www.mathworks.com/help/matlab/ref/integral2.html
If you are looking to plot the results of a definite double integral, you can plot the results of "integral2" with various bounds, depending on your specific problem.
Alternatively, depending on what you are looking for, you could use the function "int" from the symbolic math toolbox to calculate an indefinite integral, and then plot that function.
See the documentation for the "int" function for more information: https://www.mathworks.com/help/symbolic/int.html
For general information regarding double integration in MATLAB, see the following blog post: https://blogs.mathworks.com/loren/2014/02/12/double-integration-in-matlab-methods-and-handling-discontinuities-singularities-and-more/

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SRIHARSHA CHINTA
SRIHARSHA CHINTA 2020-12-16
syms x y z
int(int(x*y,x,1,sqrt(4-y)),y,0,3)
viewSolid(z,0+0*x+0*y,x*y,x,1,sqrt(4-y),y,0,3)

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