Naturally I mean that "x[1] denotes vA" and "x[2] denotes sigA" !!! Sorry for this mistake!!! Thank you and kind regards!!! bstudent. -- View this message in context: http://r.789695.n4.nabble.com/Loop-and-Solver-with-Black-Scholes-Formula-tp3470488p3470494.html Sent from the R help mailing list archive at Nabble.com.