y sessionInfo:\n\n```\n&gt; sessionInfo()\nR version 3.1.1 (2014-07-10)\nPlatform: x86_64-apple-darwin13.1.0 (64-bit)\n\nlocale:\n[1] fr_FR.UTF-8/fr_FR.UTF-8/fr_FR.UTF-8/C/fr_FR.UTF-8/C\n\nattached base packages:\n[1] stats     graphics  grDevices utils     datasets  methods   base     \n\nother attached packages:\n[1] magrittr_1.0.1  RPostgreSQL_0.4 RSQLite_0.11.4  dplyr_0.2      \n[5] RMySQL_0.9-3    DBI_0.2-7      \n\nloaded via a namespace (and not attached):\n[1] assertthat_0.1 compiler_3.1.1 parallel_