anchor.diff:     psych_1.6.9.tar.gz \
      broom_0.4.1.tar.gz \
      reshape_0.8.6.tar.gz \
  -   GGally_1.2.0.tar.gz \
  +   GGally_1.3.0.tar.gz \
      mosaic_0.14.4.tar.gz 
   
   # install rmarkdown
  
positive.code:    psych_1.6.9.tar.gz \
     broom_0.4.1.tar.gz \
     reshape_0.8.6.tar.gz \
     GGally_1.2.0.tar.gz \
     mosaic_0.14.4.tar.gz 
  
  RUN rm \
     SparseM_1.72.tar.gz \
     MatrixModels_0.4-1.tar.gz \
     quantreg_5.29.tar.gz \
     car_2.1-3.tar.gz \
     mosaicData_0.14.0.tar.gz \
     latticeExtra_0.6-28.tar.gz \
     gridExtra_2.2.1.tar.gz \
  
negative.code:    pbkrtest_0.4-6.tar.gz 
  
  RUN DEBIAN_FRONTEND=noninteractive wget \
     http://archive.linux.duke.edu/cran/src/contrib/SparseM_1.74.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/MatrixModels_0.4-1.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/quantreg_5.29.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/car_2.1-4.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/mosaicData_0.14.0.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/latticeExtra_0.6-28.tar.gz \
     http://archive.linux.duke.edu/cran/src/contrib/gridExtra_2.2.1.tar.gz \
  