Re: [R] metaMDS in vegan: zero stress

2014-05-07 Thread Jari Oksanen
Mia Bengtsson gmail.com> writes: > > Dear R and vegan package users, > > I have been experiencing problems with the metaMDS function when working on a dataset (euk) consisting of 9 > "sites" (RNA extracts of 9 biofilms samples) and 340 "species" (microbial taxa based on rRNA sequences). > The p

[R] metaMDS in vegan: zero stress

2014-05-05 Thread Mia Bengtsson
Dear R and vegan package users, I have been experiencing problems with the metaMDS function when working on a dataset (euk) consisting of 9 "sites" (RNA extracts of 9 biofilms samples) and 340 "species" (microbial taxa based on rRNA sequences). The problem is that I get nMDS ordinations with ov

[R] metaMDS Error, Nan similar or negative values

2013-06-22 Thread Suparna Mitra
H ello R-experts, I want to do ordination plots using vegan metaMDS. I have a where many cells have zero values. Data structure: X[1:10,1:14] Height.1 Height.2 Height.3 Height.4 Height.5 Height.6 Height.7 Height.8 Height.9 Height.10 Height.11 Height.12 Height.13 D30I1A 460

Re: [R] metaMDS with large dataset produces 'insufficient data' warning

2013-05-28 Thread Jari Oksanen
Raeanne Miller sams.ac.uk> writes: > > Greetings everyone, > > I am running MDS on a very large dataset (12 x 25071 - 12 model runs with 25071 output values each), and also on a > very much reduced version of the dataset (randomly select 1000 of the 25071 output values). I would like to > look

[R] metaMDS with large dataset produces 'insufficient data' warning

2013-05-27 Thread Raeanne Miller
Greetings everyone, I am running MDS on a very large dataset (12 x 25071 - 12 model runs with 25071 output values each), and also on a very much reduced version of the dataset (randomly select 1000 of the 25071 output values). I would like to look at similarities/dissimilarities between the 12

Re: [R] metaMDS

2011-09-28 Thread Gavin Simpson
On Fri, 2011-09-23 at 12:43 -0500, Jean V Adams wrote: > Lineth Contreras wrote on 09/23/2011 11:35:10 AM: > > > > Hello R-user community, > > > > I am applying the function metaMDS. However, I would like to know if > there > > is any option to export the data I got from the axis as a data frame

Re: [R] metaMDS

2011-09-23 Thread Jean V Adams
Lineth Contreras wrote on 09/23/2011 11:35:10 AM: > > Hello R-user community, > > I am applying the function metaMDS. However, I would like to know if there > is any option to export the data I got from the axis as a data frame. > > I have tried as.data.frame.list but is not working. Any sugge

[R] metaMDS

2011-09-23 Thread Lineth Contreras
Hello R-user community, I am applying the function metaMDS. However, I would like to know if there is any option to export the data I got from the axis as a data frame. I have tried as.data.frame.list but is not working. Any suggestion? Thank you in advance for your help, Lineth [[alt

Re: [R] metaMDS and envfit: Help reading output

2011-09-08 Thread Briony
Hi Katie, This is probably a bit late given the date of your post, but I was having similar problems with my own work and thought I'd respond anyway. I'm not sure that the script you've written here will fit 3D vectors for your 3D nmds. I tried it and it doesn't seem to work for me - it only gives

Re: [R] metaMDS and envfit: Help reading output

2011-05-23 Thread Gavin Simpson
On Wed, 2011-05-11 at 07:07 -0400, Michael Denslow wrote: > Hi Katie, > > On Tue, May 10, 2011 at 4:51 PM, Songer, Katherine B - DNR > wrote: > > Hello R experts, > > > > I've used metaMDS to run NMDS on some fish abundance data, and am also > > working on correlating environmental data to the N

Re: [R] metaMDS and envfit: Help reading output

2011-05-16 Thread Songer, Katherine B - DNR
Thank you Michael; this was helpful! Katie -Original Message- From: Michael Denslow [mailto:michael.dens...@gmail.com] Sent: Wednesday, May 11, 2011 06:07 AM To: Songer, Katherine B - DNR Cc: r-help@r-project.org Subject: Re: [R] metaMDS and envfit: Help reading output Hi Katie, On

Re: [R] metaMDS and envfit: Help reading output

2011-05-16 Thread Songer, Katherine B - DNR
Chamberlain [mailto:scttchamberla...@gmail.com] Sent: Tuesday, May 10, 2011 05:56 PM To: Songer, Katherine B - DNR Cc: r-help@r-project.org Subject: Re: [R] metaMDS and envfit: Help reading output Here is a thread I found on this issue:http://www.mail-archive.com/r-sig-ecology@r-project.org/msg00755.html

Re: [R] metaMDS and envfit: Help reading output

2011-05-11 Thread Michael Denslow
Hi Katie, On Tue, May 10, 2011 at 4:51 PM, Songer, Katherine B - DNR wrote: > Hello R experts, > > I've used metaMDS to run NMDS on some fish abundance data, and am also > working on correlating environmental data to the NMDS coordinates. I'm fairly > new to metaMDS and NMDS in general, so I ha

Re: [R] metaMDS and envfit: Help reading output

2011-05-10 Thread Scott Chamberlain
Here is a thread I found on this issue:http://www.mail-archive.com/r-sig-ecology@r-project.org/msg00755.html It's not a simple correlation apparently, but I can't figure out how they get the output from envfit using lm(Y ~ scores1 + scores2). You can plot the data like: library(MASS); require(

[R] metaMDS and envfit: Help reading output

2011-05-10 Thread Songer, Katherine B - DNR
Hello R experts, I've used metaMDS to run NMDS on some fish abundance data, and am also working on correlating environmental data to the NMDS coordinates. I'm fairly new to metaMDS and NMDS in general, so I have what are probably some very basic questions. My fish abundance data consists of 66

Re: [R] metaMDS NMDS: use of alternative distances?

2009-10-16 Thread Jari Oksanen
Kim Vanselow gmx.de> writes: > > Dear r-helpers! > How can I integrate other distances (in the form of a dist object) into function metaMDS? The problem: > metaMDS needs the original data.frame for the calculation and only the default distances of function > vegdist are allowed. > Any suggestion

Re: [R] metaMDS NMDS: use of alternative distances?

2009-10-14 Thread Gavin Simpson
On Wed, 2009-10-14 at 16:57 +0200, Kim Vanselow wrote: > Dear r-helpers! > How can I integrate other distances (in the form of a dist object) > into function metaMDS? The problem: metaMDS needs the original > data.frame for the calculation and only the default distances of > function vegdist are al

[R] metaMDS NMDS: use of alternative distances?

2009-10-14 Thread Kim Vanselow
Dear r-helpers! How can I integrate other distances (in the form of a dist object) into function metaMDS? The problem: metaMDS needs the original data.frame for the calculation and only the default distances of function vegdist are allowed. Any suggestions are greatly appreciated! Thank you, Kim

Re: [R] metaMDS using Dissimilarity matrix

2008-05-15 Thread Birgit Lemcke
Sorry for not translating, misspackaging (MASS) and not reading properly (zerodist). I would like to implement the weighting in distance() foo <- function(x, method, ...) as.dist(distance(x = x, method = method, weights=vectorname)) This seems to work but it would b

Re: [R] metaMDS using Dissimilarity matrix

2008-05-15 Thread Gavin Simpson
On Thu, 2008-05-15 at 13:13 +0200, Birgit Lemcke wrote: > Hello R-user community! > > I am running R 2.7.0 on a Power Book (Tiger). (I am still R and > statistics beginner) > > Presently I try to run the function metaMDS (vegan) using an existing > dissimilarity-matrix. The help for metaMDS

[R] metaMDS using Dissimilarity matrix

2008-05-15 Thread Birgit Lemcke
Hello R-user community! I am running R 2.7.0 on a Power Book (Tiger). (I am still R and statistics beginner) Presently I try to run the function metaMDS (vegan) using an existing dissimilarity-matrix. As I would like to start with this matrix I thought I could just give the matrix using