Am 13.11.2010 15:48, schrieb Sarah Goslee:
You are assuming that R is using row-major order
for recycling elements, when in fact it is using column-
major order.
It doesn't show up in the first case, because all the
elements of x are identical
Oops. Mental note made.
norm<- function(x, y
You are assuming that R is using row-major order
for recycling elements, when in fact it is using column-
major order.
It doesn't show up in the first case, because all the
elements of x are identical
> x <- c(1,1,1)
> matrix(x, nrow=2, ncol=3)
[,1] [,2] [,3]
[1,]111
[2,]1
Am 13.11.2010 14:39, schrieb Sarah Goslee:
I at least would need to see an actual example of your code to
be able to answer your question.
My function:
norm <- function(x,y){
sqrt( rowSums( (x-y)^2 ) )
}
y <- matrix(
c( 1,1,1,
2,3,4), nrow=2, byrow=TRUE)
x <- c(1,1,1)
H
Alexx Hardt wrote:
Hi,
I'm trying to write a function to determine the euclidean distance
between x (one point) and y (a set of n points). How should I pass y to
the function? Until now, I used a matrix like that:
| [,1] [,2] [,3]
[1,] 0 2 1
[2,] 1 1 1
|
I at least would need to see an actual example of your code to
be able to answer your question.
But why not just use dist() and take the appropriate column of the
resultant matrix?
mydist <- function(x, amat) {
# x is the single variable as a vector
# amat is the remaining variables as rows
alldi
Hi,
I'm trying to write a function to determine the euclidean distance
between x (one point) and y (a set of n points). How should I pass y to
the function? Until now, I used a matrix like that:
| [,1] [,2] [,3]
[1,] 0 2 1
[2,] 1 1 1
|
Which would pass the p
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