Re: [R] Distance between a vector and matrix rows

Thank you both for your reply. I went with the cosine function for similarity and used it with apply to get a measure of distance. Ravi -- View this message in context: http://r.789695.n4.nabble.com/Distance-between-a-vector-and-matrix-rows-tp3726268p3726610.html Sent from the R help mailing lis

Re: [R] Distance between a vector and matrix rows

Hi Ravi, I don't know about other packages to calculate euclidian distances but this can be done rather easily by hand: ref<-rep(1,5) apply(mydata,1,function(x)sqrt(sum((x-ref)^2))) cheers Am 08.08.2011 09:02, schrieb vioravis: > I am trying to find the distance between a vector and each row of

Re: [R] Distance between a vector and matrix rows

Hi: > sqrt(0.2) [1] 0.4472136 Evidently, distancevector() is finding the *average* distance between the two vectors. HTH, Dennis On Mon, Aug 8, 2011 at 12:02 AM, vioravis wrote: > I am trying to find the distance between a vector and each row of a > dataframe. I am using the function "distance

[R] Distance between a vector and matrix rows

I am trying to find the distance between a vector and each row of a dataframe. I am using the function "distancevector" in the package "hopach" as follows: mydata<-as.data.frame(matrix(c(1,1,1,1,0,1,1,1,1,0),nrow=2)) V1 V2 V3 V4 V5 1 1 1 0 1 1 2 1 1 1 1 0 vec <- c(1,1,1,1,1) d2<-distan