[R] how to speed up the inefficient code

[mrzung]

hi,

i'm really in trouble to simulate some experiment.
that is, it takes too much time to process the following code.

 following is short example,

-------------------------------------------------------------------------------------------------------

p<-data.frame(a=rnorm(10),b=rnorm(10),c=rnorm(10),d=rnorm(10))
test<-data.frame(a=rnorm(1),b=rnorm(1),c=rnorm(1),d=rnorm(1))

result<-list()
for(i in 1:nrow(p)){
result[[i]]<-sum((p[i,]-test)^2)
}

result_1<-unlist(result)

p_1<-cbind(p,result_1)

-------------------------------------------------------------------------------------------------------

is there any efficient way to shorten the time and make same output?


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