*! version 1.0.0 MLB 15March2008 program define getknots if "`: r(scalars)' `: r(matrices)'" != "N_knots knots" { di as err "getknots can only be used after mkspline" exit 198 } tempname knotmat matrix `knotmat' = r(knots) forvalues k = 1/`r(N_knots)' { local k = el(`knotmat',1,`k') local knots "`knots' `k'" } local knots : list retokenize knots c_local knots "`knots'" end