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关键字标识

  1. 小标题标识,如:定理:,定义: ,证明: $ ...... $
  2. 算法伪代码标识,如:for $ i=1,2,\dots, n $ do

符号说明

$ x $: 标量
$ \mathbf{x}$: 向量
$ X $: 矩阵/随机变量/数据集
$ \mathcal{X} $: 样本空间或状态空间,也可以用来表示概率分布,如$\mathcal{D}$
$ \mathbb{I}() $: 指示函数,在$$为真/假时分别取值为1/0
$ \mathrm{sign}() $: 符号函数,在$$<,=0,>0时分别取值为-1,0,1
$ E_{* \sim \mathcal{D}} [f()] $:函数$f()$对$$在分布$\mathcal{D}$下的数学期望;明确意义时将省略$\mathcal{D}$和(或)$$

知识点重要度标识

  1. 非常重要:★★★★★
  2. 很重要:★★★★
  3. 重要:★★★
  4. 相对重要:★★

模块使用惯例

  1. numpy模块
    • 函数功能以np.*为模板(统一,推荐)
    • 除*.flatten,*.ravel(必须);*.reshape外
  2. pandas模块
    • 函数功能以$.$为模板,如df.rename,df.fillna
    • 除定义功能函数外,如:
      • pd.DataFrame
      • pd.Series
      • pd.date_range
      • pd.read_excel
      • ......

jupyter notebook目录功能配置

  1. pip install jupyter_contrib_nbextensions
  2. pip install jupyter_nbextensions_configurator
  3. jupyter contrib nbextension install --user

额外安装的包

  1. xgboost: pip install xgboost
  2. PyTorch: https://pytorch.org/ 查看
  3. graphviz: pip install graphviz

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