Hello I would like to optimize a function which is as follows. nc.adj <- function(nc, G) { x = a + G + (b/(G^2 + (c - G)^2)) - nc return(x) } Can I just know how to get the optimized values of a,b,c for given G and nc using optim/optimize function. -- View this message in context: http://r.789695.n4.nabble.com/function-optimization-tp3600099p3600099.html Sent from the R help mailing list archive at Nabble.com.