With the help of Matplotlib, generating a bar plot using both Pandas's `DataFrame.plot()` and Matplotlib's `pyplot` that shows the total number of measurements taken for each treatment regi ...

I have found the following problem: I tried a new Installation of Python 3.3.2 64-bit with WinPython-64bit-3.3.2.2 on a Windows 7 64 bit machine. Ever when I try to import matplotlib.pyplot (with s ...