search for: discontiuity

Dear R team, when using optim with method "CG" I got the wrong $value for the reported $par. Example: f<-function(p) { if (!all(p>-.7)) return(2) if (!all(p<.7)) return(2) sin((p[1])^2)*sin(p[2]) } optim(c(0.1,-0.1),f,method="CG",control=list(trace=0,type=1)) $par 19280.68 -10622.32 $value -0.2346207 # should be 2!

...sive >> >>> experience that method 3 is the worst, and I don't think we should >> let >> >>> a single 2D example of a badly-behaved function override that. >> >>> >> >>> Note that no other optim method copes with the discontiuity here: >> had >> >>> your reported that it would have been clear that the problem was >> with >> >>> the example. >> >>> >> >>> On Fri, 21 Apr 2006, westfeld at inf.tu-dresden.de wrote: >> >>> &gt...

On Sat, February 13, 2016 5:57 am, Timothy Murphy wrote: > Devin Reade wrote: > >> I have a CentOS 6 machine that was initially installed as CentOS 6.4 >> in May of 2013. It's /boot filesystem is 200M which, IIRC, was the >> default /boot size at the time. > > As a matter of interest, is there any advantage today > in having a /boot partition? > I thought