Hello I have some strange output from R and I try to understand how R works.
Could you please help me with that?
temp - rbind (c(10,1),c(99,98))
temp
[,1] [,2]
[1,] 101
[2,] 99 98
dist(temp)
1
2 131.6435
sqrt(dist(temp))
1
2 11.47360
so far so good.
Hello Alex,
Look at the help page for the dist function. You'll see it doesn't
return a simple vector or matrix, rather a dist class object which
is why you got a surprise when you tried to treat it like a simple
value. The function is not really intended for spatial point distance
calculations,
Hi Alex,
What is happening is that the ´dist´function calculates a distance matrix,
and returns an object of the ´dist´ class.
temp - rbind (c(10,1),c(99,98))
x=dist(temp)
x
1
2 131.6435
class(x)
[1] dist
You can see a description of the ´dist´class at the end of the function´s
, September 16, 2010 1:28:31 PM
Subject: Re: [R] help me understand how things work.
?dist
BTW, to me this does not happens.
x - matrix(rnorm(100), nrow=5)
d - dist(x)
1/sqrt(d)
1/sqrt(dist(x))
Hope it helps
mario
On 16-Sep-10 12:02, Alaios wrote:
Hello I have some
*From:* Mario Valle mva...@cscs.ch
*To:* Alaios ala...@yahoo.com
*Sent:* Thu, September 16, 2010 1:28:31 PM
*Subject:* Re: [R] help me understand how things work.
?dist
BTW, to me this does not happens.
x - matrix(rnorm(100), nrow=5)
d - dist(x)
1/sqrt(d)
1/sqrt(dist(x))
Hope it helps
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