a character string specifying the column whose values will be used for the boxplot
plotTitle
the plot title
showPlot
0 or 1. 1 will open one or several plot windows in the R GUI, 0 will only save the plot(s) without opening windows.
Value
A boxplot of intensity values per experiment will be saved as a pdf and a png file named after the experiment name specified in the header concatenated with the plotTitle.