I am used to make my data plots with R and to save the results to static files but now I have a data set with far too many data points and I need to explore it. Due to this I need a recommendation for an interactive tool for plotting (2D) data. It should be able to interactively filter and search points by additional features associated with the data points (e.g. name). Additionally it should run on a GNU/Linux system. Any hints? Many thanks in advance.