Today, I worked on getcolor function in Matlab with Mandeep then, tried to make modules in Sagemath, then their was presentation on Emacs (text editor ) and I got inspired a lot. So,I deleted Gedit and install Emacs and thought to use Emacs or Vim only for writing programs, Then discussed the problem of histogram and found its solution but entered into another one of importing matplotlib.pyplot into sage for which I searched INTERNET and found a solution but with one limitation that I am not able to display plots on screen .