initialized ggplot2 example
finished ggplot2 example, created makefile
hide results and fig in makefile using knitr options in Rscript
fixed options in Rmd, removed options from makefile
rendered md and R files from Rmd
makefile call knitr:: w/o loading library
added figures
Merge branch 'ggplot2-example'
clarified chunk that would hide code and figs
added readme with LOs, prereqs, time est, header info
Merge branch 'master' of https://github.com/swcarpentry/bc
Merge branch 'master' of https://github.com/swcarpentry/bc
removed .Rproj from tracking
made changes to .gitignore inside ggplot2 dir, reverted global .gitignore to previous
ignore .Rproj files and .Rproj.user dir
started section on philosphy of ggplot2 and grammar of graphics; set up introduction to ggplot() function; minor markup and code formatting edits
updated todos in readme
Merge branch 'master' of https://github.com/swcarpentry/bc
added material using ggplot function
hide all messages in output and hide warning on last density plot creation