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Computes the Epanechnikov quadratic kernel in 2-D, and returns the positive kernel values.
kerMat(p)
the bandwidth parameter
A matrix containing all the positive kernel values
Bui, A.T., and Apley., D.W. (2017), "A Monitoring and Diagnostic Approach for Stochastic Textured Surfaces", Technometrics, In press.
bp
# NOT RUN { kerMat(5) # }
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