search for: distab

Displaying 4 results from an estimated 4 matches for "distab".

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2006 Nov 10
2
Problems with metaMDS from vegan
...Ubuntu, and the newer Vegan version 1.8-3 on both machines. On the new Ubuntu machine I even tried to regress to the Vegan 1.6-10, but to no avail, as the error remains the same: As soon as a I try to process an R matrix (see below) to obtain the MDS I am confronted with: > meta <- metaMDS(distab.dist, distance="bray", k, trymax=50) Fehler in rowSums(x, na.rm = TRUE) : 'x' muss ein Array mit mindestens zwei Dimensionen sein Ausf?hrung angehalten ( translated: error in rowSums(x, a.rm = TRUE) : 'x' must be an array of at least two dimensions. Execution stopped ) T...
2007 Nov 14
1
calc dist AB for B at levels of A
I have a question that I have been trying to figure out and I imagine there is a very simple answer to it. I am trying to use the distAB function in the clim.pact package I have a dataframe with 4 columns in which A is ref pt and B is site 1. longitude of A 2. Latitude of A 3. longitude of B 4. Latitude of B Problem is the columns are unequal in length column 1 and 2 are length=29 and 3 and 4 length=53 What I want to do is create...
2010 Nov 19
2
Calculating distance between longitude,latitude of 2 points
Hi all, I would like to know a way of calculating the distance between 2 points when I already have the longitude and latitude of the points. For example : Point 1 : 52? 9'54.00"N 4?25'8.40"E Point 2 : 52?27'46.80"N 4?33'18.00"E Distance between point 1 and point in km .... Is there any functions already available for this ? Any help will be much
2004 Aug 19
3
Do you know if you can map a large minimum spanning tree in R?
Thanks Mike. My data has longitude and latitude coords and I used distAB {clim.pact} then mst {ape} to calculate my minimum spanning tree. The nodes are telecoms sites from all over Australia. My goal is to determine the minimum cost of linking them via cabling, and I'm starting by calculating the distance "as the crow flies", but will probably eventuall...