John questions

• How can I run a OSX terminal command from within R?
• How to add custom series labels to a legend in R's ggplot?
• How can I include a variable name in a function call in R?
• -bash: ./configure: No such file or directory - MySQL install on Mac OS X 10.6
• What's wrong with this findnodes statement in my Perl's script?
• How can I access attributes and elements from XML::LibXML in Perl?
• Update a package and keep it from reverting to the original
• How to merge two data.frames together in R, referencing a lookup table
• R: How to remove outliers from a smoother in ggplot2?
• How to print a character list from A to Z?

John answers