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coureteousy
2010 Jun 26
4
integration of two normal density
Hello everyone,
I have a question about integration of two density function
Intuitively, I think the value after integration should be 1, but they are
not. Am I missing something here ?
> t=function(y){dnorm(y, mean=3)*dnorm(y/2, mean=1.5)}
> integrate(t, -Inf, Inf)
0.3568248 with absolute error < 4.9e-06
Also, is there any R function or package could do multivariate integration ?