Dear R Users, I am looking for a function to use within optim s.t. - f(x,a,b,c,d,e) where I am searching over parameter values a,b,c,d,e - a is the lower bound (typically 1) - b is the upper bound (typically 0) - c,d,e give the function a shift, slope and curvature between a and b
Any good candidates for a non-linear optimisation problem known, either already built into R, or otherwise. A sigmoid sort of gets half there, but I need some more control over the curvature and upper/lower bounds of the function. sigm<-function(x,a,t) 0.5*(1+(1-exp((x-a)/t))/(1+exp((x-a)/t))) Thanks in advance, Tolga ______________________________________________ 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
