Are you using euclidean distances?
On Sun, Aug 30, 2009 at 7:33 AM, Grzes<[email protected]> wrote:
>
> Hi,
> For example:
> I built a half matrix "w" using a daisy(x, metric = c("euclidean"))
>
> http://www.nabble.com/file/p25211016/1.jpg
>
> And next I transformed this matrix "w" using isoMDS function, for example
> isoMDS(w, k=2) and as result I got:
> http://www.nabble.com/file/p25211016/2.jpg
> And now I have two questions:
>
> 1. If number in matrix w[2, 1] (= 0.41538462) match two points (below) in
> matrix created by isoMDS [1,1:2] and [2,1:2] ?
> http://www.nabble.com/file/p25211016/3.jpg
>
> Is this the same point?
>
> 2. If it's true why I can't check my euclidean distance by using this
> equation:
> d<-
> ((0.511396296-(-0.129372871))^2+((-0.0171714934)-(-0.2759703494))^2)^(1/2)
>
> I thought that "d" should be 0.41538462 but unfortunately I get d=0.6910586.
> Why?
> --
> View this message in context:
> http://www.nabble.com/about-isoMDS-method-tp25211016p25211016.html
> Sent from the R help mailing list archive at Nabble.com.
>
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--
Stephen Sefick
Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.
-K. Mullis
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