Re: [R] Finding coordinates for maximum of a function

I must have mixed it up. Thank you. -- View this message in context: http://r.789695.n4.nabble.com/Finding-coordinates-for-maximum-of-a-function-tp3355369p3357460.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mai

Re: [R] Finding coordinates for maximum of a function

Right. ?which.max is what's needed. -- Bert On Tue, Mar 15, 2011 at 6:00 AM, nblarson wrote: > That actually won't work.  max(y) will give a value, not a coordinate, so > x[max(y)] is definitely not what you want. > > -- > View this message in context: > http://r.789695.n4.nabble.com/Finding-

Re: [R] Finding coordinates for maximum of a function

That actually won't work. max(y) will give a value, not a coordinate, so x[max(y)] is definitely not what you want. -- View this message in context: http://r.789695.n4.nabble.com/Finding-coordinates-for-maximum-of-a-function-tp3355369p3356483.html Sent from the R help mailing list archive at Nab

Re: [R] Finding coordinates for maximum of a function

It occured to me: x[max(y)] simple isn't it? -- View this message in context: http://r.789695.n4.nabble.com/Finding-coordinates-for-maximum-of-a-function-tp3355369p3356117.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-projec

Re: [R] Finding coordinates for maximum of a function

This is where which.max() comes in handy n<-length(x) x.c<-rep(0,n) for(i in 1:n){ x.c[i]<-which.max[y1] } x.c is then a vector of x coordinates for the maximum for columns y1,y2,...,yn -- View this message in context: http://r.789695.n4.nabble.com/Finding-coordinates-for-maximum-of-a-function-t

[R] Finding coordinates for maximum of a function

Hello R, I have data in txt file of n columns like this: x y1 .yn 1 100 2 50 3 10 4 200 5 20 I need to find coordinates for each maxima e.g.: [x,y1],[x,y2]...[x,yn] a=read.table() attach(a) b=y1<-x max(b) returns only value of y but no corresponding x value -- View this message in