Re: [R] how to solve a min problem Do you mean       minimize mu with 0 < b_func(S+mu) < 800?        For this kind of problem, I'd first want to know the nature of  "b_func".  Without knowing more, I might try to plot b_func(S+mu) vs.  mu, then maybe use 'optimize'.        If this is not what you mean, please be more specific:  I'm  confused.        Hope this helps.        Spencer Graves domenico pestalozzi wrote: > I know it's possible to solve max e min problems  by using these functions: > > nlm, optimize, optim > > but I don't know how to use them (...if possible...) to solve this problem. > > I have a personal function called  b_func(S) where S is an input array (1 X > n)  and I'd like: > > minimize mean(S) with 0 < b_funct < 800. > > I know that the solution exists, but It's possible to calculate it in R? > The b_func is non linear and it calculates a particular value using S as > input and applying a convergent iterative algorithm. > > thanks > > > domenico > > 	[[alternative HTML version deleted]] > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.