Description Usage Arguments Value
This is a c++ implementation of the fast kronecker product t(X)
1 | fastKronEye_crossprod(XtX, Sigma, pvec, n, J)
|
XtX |
a matrix that is crossprod((X1, ..., XJ)) in R |
Sigma |
JxJ covariance matrix |
pvec |
J-dimensional vector giving number of observations for each endpoint |
n |
number of observations |
J |
number of endpoints |
matrix
result of X' (Σ \otimes I_n) X
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