Calculating all distances between one point and a group of points efficiently in R

Question

First of all, I am new to R (I started yesterday).

I have two groups of points, data and centers, the first one of size n and

Answer 1

You may want to have a look into the apply functions.

For instance, this code

for (j in 1:K)
    {
    d[j] <- sqrt(sum((centers[j,] - data[i,])^2))
    }

Can easily be substituted by something like

dt <- data[i,]
d <- apply(centers, 1, function(x){ sqrt(sum(x-dt)^2)})

You can definitely optimise it more but you get the point I hope