Gerrit Eichner
2019-Sep-04 13:24 UTC
[R] [effects] allEffects does not accept integer value for xlevels
Dear list,
citing from allEffects' help page (of package effects 4.1-2):
"If xlevels=n is an integer, then each numeric predictor is
represented by n equally spaced values rounded to 'nice' numbers."
However, adapting the first example from allEffects' help
page throws an an error:
mod.cowles <- glm(volunteer ~ sex + neuroticism*extraversion,
data=Cowles, family=binomial)
allEffects(mod.cowles, xlevels=5)
Error in xlevels[[name]] : subscript out of bounds
It appears to me that the cause is buried in
effects:::Analyze.model
in or close to the the lines
if (is.numeric(xlevels) & length(xlevels) == 1L) {
levs <- xlevels
for (name in focal.predictors) xlevels[[name]] <- levs
}
where xlevels -- while not being a list in this case -- is
subscripted by xlevels[[name]].
Is anyone aware of a workaround (without having to specify all
numeric predictors of the used model explicitly in a list and
giving it to xlevels when calling allEffects), and without
having to write my own Analyze.model function? ;-)
Thx in advance and best regards -- Gerrit
PS: sessionInfo()
R version 3.6.1 (2019-07-05)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)
Matrix products: default
Random number generation:
RNG: Mersenne-Twister
Normal: Inversion
Sample: Rounding
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] stats graphics grDevices utils datasets methods base
other attached packages:
[1] effects_4.1-2 carData_3.0-2
loaded via a namespace (and not attached):
[1] Rcpp_1.0.2 lattice_0.20-38 MASS_7.3-51.4 grid_3.6.1
[5] DBI_1.0.0 nlme_3.1-141 survey_3.36
estimability_1.3
[9] minqa_1.2.4 nloptr_1.2.1 Matrix_1.2-17 boot_1.3-23
[13] splines_3.6.1 lme4_1.1-21.9001 survival_2.44-1.1 compiler_3.6.1
[17] colorspace_1.4-1 mitools_2.4 nnet_7.3-12
---------------------------------------------------------------------
Dr. Gerrit Eichner Mathematical Institute, Room 212
gerrit.eichner at math.uni-giessen.de Justus-Liebig-University Giessen
Tel: +49-(0)641-99-32104 Arndtstr. 2, 35392 Giessen, Germany
http://www.uni-giessen.de/eichner