Re: [R] functions with function inputs and optimisation

On 10.05.2013 08:19, Sachinthaka Abeywardana wrote: Hi all, Would be great if you could help me get my head around the "further arguemnts" in the optim function. Let's say we have f and g as shown: f<-function(x,a,b){(x-a)^2+b} optim(100,fn=f,gr=NULL,2,5) #the NULL is annoying g<-function(x

[R] functions with function inputs and optimisation

Hi all, Would be great if you could help me get my head around the "further arguemnts" in the optim function. Let's say we have f and g as shown: f<-function(x,a,b){(x-a)^2+b} optim(100,fn=f,gr=NULL,2,5) #the NULL is annoying g<-function(x,a){2*(x-a)} optim(100,fn=f,gr=g,2,5) 1. How does opti