Create simple graphing functions?

[mattkerlogue]

ggplot requires a fair bit of tinkering (and this shouldn't be discouraged), but perhaps useful to create some functions to create very simple common charts (column/bar, line, point/scatter, line w/ points, pie) - user just has to provide data, set x/y/group variables and the chart type for a standardised plot to be produced.

[mattkerlogue]

Other possible arguments: chart title/axis labels, data labels.