Re: [R-sig-eco] Adonis and Random Effects

2013-03-27 Thread Erin Nuccio
his helps > > Steve > > From: Erin Nuccio [enuc...@gmail.com] > Sent: Saturday, March 09, 2013 9:09 PM > To: JOHN S BREWER > Cc: r-sig-ecology@r-project.org > Subject: Re: [R-sig-eco] Adonis and Random Effects > > Hi Steve and R li

Re: [R-sig-eco] Adonis and Random Effects

2013-03-11 Thread Erin Nuccio
e residual >>> error term, which will be wrong, but you ca! n ignore that. I've tried it with my own data and it works. One cautionary note. See the posts by Jari Oksanen and others about the versions of BiodiversityR and R used. >>> >>> Hope this helps >>>

Re: [R-sig-eco] Adonis and Random Effects

2013-03-10 Thread Erin Nuccio
ich will be wrong, but you can! ignore that. I've tried it with my own data and it works. One cautionary note. See the posts by Jari Oksanen and others about the versions of BiodiversityR and R used. >> >> Hope this helps >> >> Steve >> >> From: Erin

Re: [R-sig-eco] Adonis and Random Effects

2013-03-10 Thread Erin Nuccio
; Sent: Saturday, March 09, 2013 9:09 PM > To: JOHN S BREWER > Cc: r-sig-ecology@r-project.org > Subject: Re: [R-sig-eco] Adonis and Random Effects > > Hi Steve and R list, > > I was hoping you could clarify something you mentioned in previous post. > > A quick recap

Re: [R-sig-eco] Adonis and Random Effects

2013-03-10 Thread JOHN S BREWER
R used. Hope this helps Steve From: Erin Nuccio [enuc...@gmail.com] Sent: Saturday, March 09, 2013 9:09 PM To: JOHN S BREWER Cc: r-sig-ecology@r-project.org Subject: Re: [R-sig-eco] Adonis and Random Effects Hi Steve and R list, I was hoping you co

Re: [R-sig-eco] Adonis and Random Effects

2013-03-09 Thread Erin Nuccio
Hi Steve and R list, I was hoping you could clarify something you mentioned in previous post. A quick recap... I have a split-plot design where I determined the microbial communities at 3 grasslands (see post script for design). I am trying quantify the how much of my community can be explain

Re: [R-sig-eco] Adonis and Random Effects

2013-02-05 Thread Erin Nuccio
Thanks Steve and Jari for your responses. I really do appreciate it -- trying to analyze this data has been a challenge! Based on both your responses, it seems like I won't be able to get adonis to do the appropriate tests for the Grassland effect (since I do not know how to design custom per

Re: [R-sig-eco] Adonis and Random Effects

2013-02-04 Thread Steve Brewer
Erin, There have been a lot of similar queries (e.g., repeated measures, nested permanova). Jari can correct me if I am wrong, but as far as I know, no one has developed a way to define multiple error terms in adonis. You can use adonis, however, to get the split-plot effects. If you want to mak

Re: [R-sig-eco] Adonis and Random Effects

2013-02-04 Thread Jari Oksanen
On 04/02/2013, at 09:14 AM, Erin Nuccio wrote: > > Is adonis capable of modeling random effects? No, adonis does not know random effects. The significance tests in adonis() are based on permutations. The key question for random effects is: "can you design a permutation matrix that treats so

[R-sig-eco] Adonis and Random Effects

2013-02-03 Thread Erin Nuccio
Hello List, Is adonis capable of modeling random effects? I'm analyzing the impact of a treatment on the microbial community in a split-plot design (2 treatments per plot, 4 plots per grassland, 3 grasslands total). I would like to quantify how much of the variance is due to the Treatment vers