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Compute Jacobian
jacobian(expr, vars)
'caracas expression'.
variables to take derivative with respect to
score(), hessian() der()
score()
hessian()
der()
if (has_sympy()) { x <- paste0("x", seq_len(3)) def_sym_vec(x) y1 <- x1 + x2 y2 <- x1^2 + x3 y <- c(y1, y2) jacobian(y, x) u <- 2 + 4*x1^2 jacobian(u, x1) }
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