Hi everyone,

I'm attempting to run a zero-truncated Poisson using VGAM and I run into
this error:

Error in if ((temp <- sum(wz[, 1:M, drop = FALSE] < wzepsilon)))
warning(paste(temp,  : 
  argument is not interpretable as logical

Here's the code I'm using

blja <- read.csv("g:\\blja\\blja.csv", header=T)
library(VGAM)
glm1 <- vglm(blja$taken ~ blja$mass + blja$year,family=pospoisson,
data=blja)

We're looking at the number of acorns taken by jays using year (two
years) and how much (mass) they're taking. 

Our data looks like this:
 
year	size	distance	taken	mass	
one	small	30.8735	10	13.8758	
one	small	121.505	2	2.77516	
one	small	46.055	12	16.65096	
one	small	46.055	1	1.38758	
one	small	46.055	4	5.55032	
one	small	9.343	1	1.38758	
one	small	46.055	10	13.8758	
one	small	46.055	3	4.16274	
one	small	46.055	5	6.9379	
one	small	85.271	5	6.9379	
one	small	85.271	1	1.38758	
one	small	85.271	5	6.9379	
one	small	85.271	3	4.16274	
...

Any suggestions (and alternatives!) would be appreciated!

Thanks a bunch,

Jeff

************************************
Dr. Jeffrey A. Stratford
Department of Health and Biological Sciences
84 W. South Street
Wilkes University, PA 18766
jeffrey.stratford@wilkes.edu
570-408-4761 (office)
570-332-2942 (cell)
http://web.wilkes.edu/jeffrey.stratford/
************************************



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