Displaying 3 results from an estimated 3 matches for "t_cholmod_rowfac".
2009 Dec 24
1
Multiple CHOLMOD errors when attempting poisson glmm
Hello,
I have been attempting to run a poisson glmm using lme4 for some time now
and have had a lot of trouble. I would say 9 times out of 10 I receive the
following warning:
CHOLMOD warning: %h
Error in mer_finalize(ans) :
Cholmod error `not positive definite' at
file:../Cholesky/t_cholmod_rowfac.c, line 432
My data are counts of microbe colony forming units (CFUs) collected from
termite cuticles and the surrounding environment over a 3 year period. I am
attempting to analyze the effect of several factors on these counts (termite
nest volume, temperature, humidity, light, incubation tempe...
2012 Feb 06
1
lmer with spatial and temporal random factors, not nested
...REML=FALSE),
where
richness = integer
Y & Treatment = factor
Canopy & Veg_cm = numerical, continous
Site/Block/Plot= factor
Year = integer
I get the following warning message:
Warning messages:
1: In mer_finalize(ans) :
Cholmod warning 'not positive definite' at
file:../Cholesky/t_cholmod_rowfac.c, line 432
2: In mer_finalize(ans) : singular convergence (7)
Is this due to the nature of my fixed/random factors or the way I put
up the random factors?
In lme I could include a component for autocorrelation,
ex:cor=corAR1(form=~Year|Site/Block/ID). Does the equivalent exist for
lmer?
I will...
2010 Jul 01
0
Cholmod warning when fitting a poisson GLMM
...6 -0.0112525 -0.262753 -0.414740 -27.2429
10: nan: -0.174440 0.823699 0.851474 -3.66912 0.0283103 -0.118455 0.193071 -1.35997 0.103926 -0.0112525 -0.262753 -0.414740 -27.2429
Message d'avis :
In mer_finalize(ans) :
Cholmod warning 'not positive definite' at file:../Cholesky/t_cholmod_rowfac.c, line 432
> sessionInfo()
R version 2.11.1 (2010-05-31)
i386-pc-mingw32
locale:
[1] LC_COLLATE=French_France.1252 LC_CTYPE=French_France.1252 LC_MONETARY=French_France.1252 LC_NUMERIC=C
[5] LC_TIME=French_France.1252
attached base packages:
[1] grDevices datasets ...