TukeyHSD plot error

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Hmmm, I can't reproduce, but I'm not really sure why that would
happen... is there any way you can test this in a --vanilla R session?
(That's the UNIX-y way to start a totally clean session; not sure
exactly how to achieve that on Windows)

Does this happen if you just run

example(TukeHSD)

directly or only when you copy and paste the commands yourself?
Hopefully we'll be able to track this down, but my initial guess is
that it's some nasty combination of all the packages you have up.

Michael
Hi, I am seeking help with an error when running the example from R
Documentation for TukeyHSD. ?The error occurs with any example I run, from
any text book or website. ?thank you...

plot(TukeyHSD(fm1, "tension")).
Error in plot(confint(as.glht(x)), ylim = c(0.5, n.contrasts + 0.5), ...) :
?error in evaluating the argument 'x' in selecting a method for function
'plot': Error in UseMethod("vcov") :
?no applicable method for 'vcov' applied to an object of class "NULL"

?TukeyHSD
require(graphics)

summary(fm1 <- aov(breaks ~ wool + tension, data = warpbreaks))
? ? ? ? ? ?Df Sum Sq Mean Sq F value ?Pr(>F)
wool ? ? ? ? 1 ? ?451 ? 450.7 ? 3.339 0.07361 .
tension ? ? ?2 ? 2034 ?1017.1 ? 7.537 0.00138 **
Residuals ? 50 6748 135.0
---
Signif. codes: ?0 ?***? 0.001 ?**? 0.01 ?*? 0.05 ?.? 0.1 ? ? 1
TukeyHSD(fm1, "tension", ordered = TRUE)
?Tukey multiple comparisons of means
? ?95% family-wise confidence level
? ?factor levels have been ordered

Fit: aov(formula = breaks ~ wool + tension, data = warpbreaks)

$tension
? ? ? ? diff ? ? ? ?lwr ? ? ?upr ? ? p adj
M-H ?4.722222 -4.6311985 14.07564 0.4474210
L-H 14.722222 ?5.3688015 24.07564 0.0011218
L-M 10.000000 ?0.6465793 19.35342 0.0336262

plot(TukeyHSD(fm1, "tension"))
Error in plot(confint(as.glht(x)), ylim = c(0.5, n.contrasts + 0.5), ...) :
?error in evaluating the argument 'x' in selecting a method for function
'plot': Error in UseMethod("vcov") :
?no applicable method for 'vcov' applied to an object of class "NULL"
sessionInfo()
R version 2.15.0 (2012-03-30)
Platform: i386-pc-mingw32/i386 (32-bit)

attached base packages:
?[1] grid ? ? ?tcltk ? ? splines ? stats ? ? graphics ?grDevices datasets
?utils ? ? methods ? base

other attached packages:
?[1] RcmdrPlugin.HH_1.1-30 HH_2.2-30 ? ? ? ? ? ? latticeExtra_0.6-19
RColorBrewer_1.0-5
?[5] leaps_2.9 ? ? ? ? ? ? multcomp_1.2-12 ? ? ? mvtnorm_0.9-9992
?NADA_1.5-4
?[9] ggplot2_0.9.0 ? ? ? ? Rcmdr_1.8-3 ? ? ? ? ? car_2.0-12
?nnet_7.3-1
[13] DAAG_1.12 ? ? ? ? ? ? survival_2.36-12 ? ? ?randomForest_4.6-6
?rpart_3.1-52
[17] RODBC_1.3-5 ? ? ? ? ? tree_1.0-29 ? ? ? ? ? spatstat_1.25-5
mgcv_1.7-13
[21] sciplot_1.0-9 ? ? ? ? spdep_0.5-45 ? ? ? ? ?coda_0.14-6
deldir_0.0-16
[25] maptools_0.8-14 ? ? ? foreign_0.8-49 ? ? ? ?nlme_3.1-103
?MASS_7.3-17
[29] boot_1.3-4 ? ? ? ? ? ?sp_0.9-98 ? ? ? ? ? ? odesolve_0.9-9
?mcmc_0.8
[33] lme4_0.999375-42 ? ? ?Matrix_1.0-6 ? ? ? ? ?lattice_0.20-6
?chron_2.3-42
[37] akima_0.5-7 ? ? ? ? ? rcom_2.2-3.1.1 ? ? ? ?rscproxy_1.3-1

loaded via a namespace (and not attached):
?[1] colorspace_1.1-1 dichromat_1.2-4 ?digest_0.5.2 ? ? memoise_0.1
?munsell_0.3 ? ? ?plyr_1.7.1
?[7] proto_0.3-9.2 ? ?reshape2_1.2.1 ? scales_0.2.0 ? ? stats4_2.15.0
?stringr_0.6 ? ? ?tools_2.15.0

? ? ? ?[[alternative HTML version deleted]]

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