9. Some practices on Django & bower

   As a front-end developer, most of you may know bower these days. Bower is a powerful tools to make your front-end more modular and easy to manage.

   And Django is also very popular in the back-end deveopment. Douban, Zhihu all uses Django as their backend framework.

   Today, I am just ...

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10. Apriori Algorithm

    在大规模数据集中寻找关系：

    • 频繁项集：经常出现在一块的物品的集合
    • 关联规则：暗示两种物品之间可能存在很强的关系

    如何定量地定义关系？如何定义频繁？

    以啤酒，尿布的故事为例，

    • 支持度：数据集中包含该项集的记录所占的比例。比如一共有5条交易记录，其中4条出现了{尿布}，则尿布的支持度就为4/5。再比如，如果数据集中有3条同时出现了{尿布，啤酒}，则项集{尿布，啤酒}的支持度就为3/5。

    • 置信度：针对关联规则定义。我们现在知道了{尿布}的支持度为4/5，{尿布，啤酒}的支持度为3/5，呢么{尿布}->{啤酒}的关联规则的可信度可以被定义为“支持度({尿布，啤酒})/支持度({尿布 ...

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11. OpenCV settings on Mac

    Install homebrew

    Type the following directions to install homebrew

    ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
    

    Install OpenCV

    After installing homebrew, we just need to type the following direction to install OpenCV

    brew install opencv
    

    It will not always works well. There may be kind ...

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12. Python File Operating

    Python's file operating is so powerful that you may use python to operate your file system as shell did. In the following topics, I will do some introduction of python's file operations.

    ---

    Package

    We need to import some of the packages provided defaultly by python. All of it ...

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13. Python Print to a File

    One day, when I was writing a program that requires a 2D map. All things are well designed and the random map is printed to the console screen. However, I found what I need is not to show my some maps, but to the computer, which to let the computer ...

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14. Vim + Youcompleteme Settings

    Vim, as an excellent editor which have already been admitted by many coders, may be the first choice to editor C/C++ program.

    Vim can do many things fluently in editing, however, vim can't do everything in coding. In many IDEs, the basic function is to complete a variable ...

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