[acs-r] acs:acs.fetch missing key file_test library path

[Stoney Vintson]

1. When the acs.fetch() function is called without a key, the file_test
does not set the file_test parameter .lib_loc.  This causes it to fail on
my Ubuntu 16.04 installation where the library is installed system wide at
"/usr/local/lib/R/site-library/acs".  I am using acs.fetch through newer
functionality in the package choroplethr.

a. These functions and variables are good candidates for the file_test
parameter .lib_loc which defaults to NULL.


   - .libPaths()
   - .Library.site

b. Alternatively, you could prepend the correct library path from
.libPaths() to the string literal using paste() or stringr:str_c()


2. Instead of using acs:api.key.install() because of the system folder
permissions, I was able to manually create the directory using
sudo/administrative commands.

> cd /usr/local/lib/R/site-library/acs
> sudo mkdir exdata
> sudo cp /home/<user_name>/key.rda exdata


3.  I usually use the command line to install cran packages because it
helps me work more efficiently when there are missing system libraries,
older versions of system libraries, or missing R package dependencies.
This is especially true with geospatial libraries such as GDAL/OGR.  I use
both rstudio and rstudio server on different Ubuntu machines

> sudo su - -c "R -e \"install.packages('acs', repos = '
http://cran.rstudio.com/')\""


-- 
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