Session Info

sessionInfo()
R version 3.2.1 (2015-06-18)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252    LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                           LC_TIME=English_United States.1252

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

other attached packages:
[1] devtools_1.8.0 dplyr_0.4.2    ggplot2_1.0.1  biglm_0.9-1    DBI_0.3.1      outliers_0.14  broom_0.3.7    tidyr_0.2.0

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.0      xml2_0.1.1       magrittr_1.5     MASS_7.3-43      mnormt_1.5-3     munsell_0.4.2    colorspace_1.2-6
 [8] R6_2.1.0         httr_1.0.0       stringr_1.0.0    plyr_1.8.3       tools_3.2.1      parallel_3.2.1   grid_3.2.1
[15] gtable_0.1.2     psych_1.5.6      git2r_0.10.1     rversions_1.0.2  lazyeval_0.1.10  assertthat_0.1   digest_0.6.8
[22] reshape2_1.4.1   curl_0.9.1       memoise_0.2.1    stringi_0.5-5    scales_0.2.5     proto_0.3-10