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What does "number of groups < 50"

1 message · Maria Paola Bissiri

Original
Maria Paola Bissiri
# 
Dear Dr. Curis,
thank you very much. I will run the bootstrap with a higher number of  
simulations.

Unfortunately there is another major problem now. When I try to  
generate the glmer model on Linux again, it does not converge anymore.
I get this error message, which I did not get before:
In (function (fn, par, lower = rep.int(-Inf, n), upper = rep.int(Inf,  :
   failure to converge in 10000 evaluations
The other two models, for which I need to run the bootstrap on Linux,  
too, do not converge on Linux either. All three models still converge  
on Windows.

This happened after our system administrator installed R on two more  
Linux machines upon my request, although I don't see any connection  
with this, the glmer model does not converge on any Linux machine. On  
all four Linux machines and on Windows the versions of R, lme4, Matrix  
and lattice have the same number.
I would be thankful for any suggestion to solve the problem.
I copy sessionInfo() information below.
Kind regards,
Maria Paola

Windows:

R version 3.0.2 (2013-09-25)
Platform: i386-w64-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=German_Germany.1252  LC_CTYPE=German_Germany.1252
[3] LC_MONETARY=German_Germany.1252 LC_NUMERIC=C
[5] LC_TIME=German_Germany.1252

attached base packages:
[1] splines   stats     graphics  grDevices utils     datasets  methods
[8] base

other attached packages:
[1] phia_0.1-5      car_2.0-19      lme4_1.0-4      Matrix_1.0-14
[5] lattice_0.20-23 Hmisc_3.12-2    Formula_1.1-1   survival_2.37-4

loaded via a namespace (and not attached):
[1] cluster_1.14.4 grid_3.0.2     MASS_7.3-29    minqa_1.2.1    nlme_3.1-111
[6] nnet_7.3-7     rpart_4.1-3


Linux:

R version 3.0.2 (2013-09-25)
Platform: x86_64-unknown-linux-gnu (64-bit)

locale:
  [1] LC_CTYPE=de_DE.UTF-8       LC_NUMERIC=C
  [3] LC_TIME=de_DE.UTF-8        LC_COLLATE=de_DE.UTF-8
  [5] LC_MONETARY=de_DE.UTF-8    LC_MESSAGES=de_DE.UTF-8
  [7] LC_PAPER=de_DE.UTF-8       LC_NAME=C
  [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=de_DE.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] lme4_1.0-4      Matrix_1.0-14   lattice_0.20-23

loaded via a namespace (and not attached):
  [1] afex_0.6-82       car_2.0-19        coin_1.0-23       grid_3.0.2
  [5] MASS_7.3-29       minqa_1.2.1       modeltools_0.2-21 mvtnorm_0.9-9996
  [9] nlme_3.1-111      nnet_7.3-7        pbkrtest_0.3-7    plyr_1.8
[13] reshape2_1.2.2    splines_3.0.2     stats4_3.0.2      stringr_0.6.2
[17] survival_2.37-4




Zitat von Emmanuel Curis <emmanuel.curis at parisdescartes.fr>: