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Hi, I try beta regression model using "betareg". I have two questions: (i) The example data pratergrouped is not exist. > pratergrouped [1] V11 V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 <0 rows> (or 0-length row.names...

Hi, I am using nlme for data from nested design. That is, "tows" are nested within "trip", "trips" nested within "vessel", and "vessels" nested within "season". I also have several covariates, say "tow_time", "latitude" and "depth" My model is...

Hi, I believe that this is not a right place to post this question. However, I am using R and found that I am able to got many valuable hints. Therefore, I would ask: Does any one have the references...

Hi, I need the help on this topic because this is out of my statistical trianing as biologist. Here is my brief description of the problem. I have a survey that VESSELs are selected at random with the probability of...

Dear R-users, Could any give me a guidence to solve the following problem? I have three balls A, B and C. I can pick A, B or C at the first selection. At the second and third selections, I...

Hi, I have trouble to figure out how the df is derived in LME. Here is my model, lme(y~x+log(den)+sex+dep,data=lwd,random= list(group=~x)) Number of total samples (N) is 3237 number of...

Hi, All Thanks to Robert Baskin, Thomas Lumley, and Spencer Graves for the valuable helps. I have learned a lot from this discussion. I put all discussions together without editing, so we can see how things are evolved. Likely, I...

Sorry, by mistake I sent this to Professor Bates instead of r-help. Han -------- Original Message -------- Subject: Re: [R] degrees of freedom for t-tests in lme Date: Thu, 25 Apr 2002 09:16:16 -0700 From: Han-Lin Lai...