Another good source on visual presentation (of data) is Cleveland (author of "The Elements of Graphing Data", see http://www.win-vector.com/blog/2013/02/revisit

Another good source on visual presentation (of data) is Cleveland (author of "The Elements of Graphing Data", see http://www.win-vector.com/blog/2013/02/revisiting-clevelands-the-elements-of-graphing-data-in-ggplot2/ http://www.win-vector.com/blog/2013/02/revisiting-clevelands... ). The neat thing is Cleveland formally tested a lot of his visualization principles (asking people to estimate things from different graphs).