[R] {car} outlierTest looses p/q values

[Phil]

Hi guys,

I came across a strange phenomena and can't figure out why it happens by 
myself so here we go.

I got a dataframe which consists of double numbers which I want to 
check, row-wise if there are outliers in the rows.

So I iterate over the rows and create a glm using the numbers of that 
particular row. Which might look like this:

case1)
         x1        x2        x3        x4        x5        x6 x7        
x8        x9        x10        x11
     0.00     3.91     0.00     0.00     0.00   68.03   40.39 0.00     
0.00      0.00       4.11

or like this:
case2)
         x1        x2        x3        x4        x5        x6 x7        
x8        x9        x10        x11
      1.00     1.00    1.00     1.00     1.00     1.00     1.00 1.00     
1.00     1.00      5.34

or any other combination of double numbers...

however, using a glm like this:

glModel <- glm(vector ~ some_other_meta_data_which_is_double_numbers)

and testing it with:

  test.Res <- outlierTest(glModel,digits=4,cutoff=Inf,n.max=Inf)

I always get a result consisting of the desired p and q values but not 
if the vector I use looks like case2. There is no error message and the 
computation does not stop either.
However, all p and q values are produced except for the last value x11.

Any idea why this particular value gets dropped from the output of the 
outlierTest Method in the car package.

Here is the sessioninfo:

  sessionInfo()
R version 3.1.1 (2014-07-10)
Platform: x86_64-redhat-linux-gnu (64-bit)

locale:
  [1] LC_CTYPE=en_US.utf8       LC_NUMERIC=C
  [3] LC_TIME=en_US.utf8        LC_COLLATE=en_US.utf8
  [5] LC_MONETARY=en_US.utf8    LC_MESSAGES=en_US.utf8
  [7] LC_PAPER=en_US.utf8       LC_NAME=C
  [9] LC_ADDRESS=C              LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C

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

other attached packages:
[1] ggplot2_1.0.0      car_2.0-21         RColorBrewer_1.0-5 iNEXT_1.0
[5] vegan_2.0-10       lattice_0.20-29    permute_0.8-3

loaded via a namespace (and not attached):
  [1] colorspace_1.2-4 compiler_3.1.1   digest_0.6.4 grid_3.1.1
  [5] gtable_0.1.2     labeling_0.3     MASS_7.3-33 munsell_0.4.2
  [9] nnet_7.3-8       plyr_1.8.1       proto_0.3-10 Rcpp_0.11.2
[13] reshape2_1.4     scales_0.2.4     stringr_0.6.2    tools_3.1.1

Any help is highly appreciated.

Thanks

Phil