(this post suggests a patch to the sources, so i allow myself to divert
it to r-devel)
Bert Gunter wrote:
> x a numeric vector, matrix or data frame.
> y NULL (default) or a vector, matrix or data frame with compatible
> dimensions to x. The default is equivalent to y = x (but more efficient).
-project.org
Subject: Re: [R] variance/mean
rkevinbur...@charter.net wrote:
> At the risk of appearing ignorant why is the folowing true?
>
> o <- cbind(rep(1,3),rep(2,3),rep(3,3))
> var(o)
> [,1] [,2] [,3]
> [1,]000
> [2,]000
> [3,]0
Wacek Kusnierczyk wrote:
>
> when you apply var to a single matrix, it will compute covariances
> between its columns rather than the overall variance:
>
> set.seed(0)
> x = matrix(rnorm(4), 2, 2)
>
> var(x)
> #[,1] [,2]
> # [1,] 1.2629543 1.329799
>
rkevinbur...@charter.net wrote:
> At the risk of appearing ignorant why is the folowing true?
>
> o <- cbind(rep(1,3),rep(2,3),rep(3,3))
> var(o)
> [,1] [,2] [,3]
> [1,]000
> [2,]000
> [3,]000
>
> and
>
> mean(o)
> [1] 2
>
> How do I get mean to return an ar
On 22-Mar-09 08:17:29, rkevinbur...@charter.net wrote:
> At the risk of appearing ignorant why is the folowing true?
>
> o <- cbind(rep(1,3),rep(2,3),rep(3,3))
> var(o)
> [,1] [,2] [,3]
> [1,]000
> [2,]000
> [3,]000
>
> and
>
> mean(o)
> [1] 2
>
> How do
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