Lei Feng 的 Blog

Markdown is a way to write web content. Formatting text in Markdown doesn’t do anything fancy like changing font size, color, or type in CSS, instead it only defines different formatting elements through putting a few symbols, such as asterisks(*) and backticks(`), around plaintext to display the plaintext as bold, headers, lists, code blocks, etc. Technically speaking, Markdown is simplier than HTML and CSS to format your web content. This is one of the reasons why I moved my blog from Wordpress.com to Github Pages. In this post I listed out some frequently used formatting elements syntax in Markdown. It have been used as a quick reference for my daily writing. Read More...

If you get tired with Windows or Mac, like me, you might want to consider migrating to Ubuntu Trusty 14.04, which is the Long Term Support (LTS) version of the Ubuntu operating system for desktop PCs and laptops. It can be downloaded from Ubuntu official site for free and it is easy to install following the instructions there. Recently, I just downloaded and installed it on my old HP Compaq 6510b laptop. Comparing to almost 20 GBs of my old Windows 7 system, my new Ubuntu system only occupies 6.3 GBs and runs much faster. Read More...

As more and more Python packages I need to install for my daily work and learn, I get tired of searching and installing individual packages, especially on my Window system, like what I did in how to install scientific Python packages on Windows. I decide to give Anaconda (by Continuum Analytics) a try, what it provides far exceed my expectation and I feel guilty did not try it earlier. Read More...

NumPy, SciPy, Pandas, and Matplotlib are fundamental scientific computing and visualization packages with Python. Scikit-learn is a simple and efficient package for data mining and analysis in Python. NLTK (the Natural Language Toolkit) is a leading platform for building Python programs to work with human language data. However, if you are using Python on Windows, it seems not easy to install these packages. Thanks to Christoph Gohlke, who provides the non-official Python extension packages for Windows. With these unofficial packages, there is a simple way to install these libraries on Windows. Read More...

Upated on April 28, 2020 with testing on Windows 10. After installed IBM ILOG CPLEX Optimization Studio 12.6, I tried the instructions described in the IBM Knowledge Center to set up Java APIs for CPLEX and CP in Eclipse, but the instructions did not work correctly. Here is what I did to build a java project with CPLEX  and CP Java APIs in Eclipse. These steps have been done in Eclipse on Windows 7 and 10, not sure if it works for other Java IDEs or other OSs. It also assumes that the IBM ILOG CPLEX Optimization Studio has already been installed. Read More...