There are variety of languages and modeling packages available at the dispense of any predictive modeler. In most surveys capturing the trends and usage of various packages and software tools, R and Python occupy the top positions. Surprisingly these are both command line languages. The reasons for this are many. But what are advantages of using command line languages like R and Python or GUI based packages? Which user interface is useful to what kind of programmers? What is the market share of usage of these packages? Which one among them is most useful for a job aspirant? To know answers read