Initial commit
First Upload

Initial practice assignment and data upload.  Includes an RMD file, a
pdf copy of the markdown and a zip file containing the required data
files for the assignment.
Updated readme
Added instructions for unzipping files within R.
Updated subsetting examples and adding md and html versions of the
instructions.
Update README.md
Changed the subset method used in the function example
Found one more use of the subset() command and swapped it out.
cleaned up variable naming conventions
Updated the subsetting examples.
formatting tweak
Updated PDF
Fixed typo
edited formats
Delete practice_assignment.html
Delete practice_assignment.md
Updated zip file link and added a few example summary commands to the tutorial
Fixed typos
Updated url for zip file
Updates to help explain looping and function arguments a bit better

Updates to help explain looping and function arguments a bit better