I want to calculate the integral of a bidirectional reflectance distribution function(a function with 2 direction parameters both represent by a pair of theta and phi, so it's a 4D function). Since the function is usually not easy to factor out as multiplication of lower dimensional function it's hard to use command such as "integral" or "integral2", any suggestion about this issue ?
MATLAB: How to perform 4D integral in matlab
integrationMATLABnumerical integration
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