Nothing
rsespc <- function(n, mu, theta) {
the1 <- theta[1]
the2 <- theta[2]
if ( the1 == 0 & the2 == 0 ) {
y <- Rfast::rmvt(n, mu, sigma = diag(3), v = 1)
} else {
m0 <- sqrt(mu[2]^2 + mu[3]^2)
rl <- sqrt(sum(mu^2))
x1b <- c(-m0^2, mu[1] * mu[2], mu[1] * mu[3])/(m0 * rl)
x2b <- c(0, -mu[3], mu[2])/m0
T1 <- tcrossprod(x1b)
T2 <- tcrossprod(x2b)
T12 <- tcrossprod(x1b, x2b)
vinv <- diag(3) + the1 * (T1 - T2) + the2 * (T12 + t(T12)) +
( sqrt(the1^2 + the2^2 + 1) - 1 ) * (T1 + T2)
va <- solve(vinv)
y <- Rfast::rmvt(n, mu, va, v = 1)
}
colnames(y) <- c("X", "Y", "Z")
y / sqrt( Rfast::rowsums(y^2) )
}
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