LaTeX中常用代码段snippets(持续更新)

　　1.displaymath 单行数学环境，不带编号。

egin{displaymath}
  This is displaymath envirment. I don
 't have a tag
end{displaymath}

　　2.equation 单行数学环境，全文按序编号。

egin{equation}
	This is equation envirment. I have a tag
end{equation}

　　3.itemize 条目环境，按小圆点排列。

egin{itemize}
  item This is 
  item itemize environment
end{itemize}

　　4.enmerate 枚举环境，按数字序号排列。

egin{enumerate}
	item This is 
	item enumerate enviroment
end{enumerate}

　　5.quotation 引用环境，将输入看作纯文本，有大缩进。

egin{quotation}
  This is quotation environment. I have big indent, and output plaintext.
end{quotation}

　　6.verbatim 复读环境，字体特殊，将输入看作纯文本。

egin{verbatim}
  This is verbatim enviroment.I also output plaintext.
end{verbatim}

　　7.tabular 表格环境。

egin{tabular}{l|c|c}
  Aloha&This is tabular environment & I can have many rows\
  hline
  I am BJ&Hello World &I love you\
  &I can make multiple lines & I can even enter $int$
end{tabular}

　　其中{}框住的三个字母lcc表示表格有三列，l:本列左对齐,c:本列居中,r:本列右对齐。&符号分割表项，\换行，hline添加水平线。

　　8.description 描述环境，将输入看作纯文本。

egin{description}
  item[This is describe environment.]
  item[It seems cool.]
end{description}

　　9.matrix 矩阵环境，使用时要加载amsmath包，并用美元括住。编译器会将matrix看作数学符号处理。

$$
egin{matrix}
  I& am& a\
  Matrix& I& am\
  seen& as& a symbol
end{matrix}
$$

　　10.table 浮动表格环境，浮动体位置更灵活。

egin{table}[hbt]
  egin{tabular}{l|cc}
    & I& just\
    hline
   & like & tabular\
    & environment&but more complete
  end{tabular}
  caption{This is a floating table.}
end{table}

　　11.preamble 引言环境。

	itle{This is a preamble}
author{Chester}
date{	oday}
maketitle

　　12.figure 图片环境。

egin{figure}[hbt]
  centering
  includegraphics{lenna.png}
  caption{lenna}
end{figure

　　13.一个更灵活的图片环境，并且可以居中与缩放图片，需要graphicx包

{centeringincludegraphics[scale=0.85]{test.png}

}\ 注意这里必须要空一行，这和tex的对齐方式有关，留待日后

　　14.一个表格的实例，比较细节，含有合并单元格的操作，需要algorithm和algorithmic包

egin{tabular}{|l|c|c|c}
    	  multicolumn{2}{}&&multicolumn{2}{|c}{Predicted Classes}\ cline{3-4}
	  multicolumn{2}{}&&multicolumn{1}{|c|}{zero }& nonzero\
	  hline 
	  Real&zero&975&5\ cline{2-4}
	  Class&nonzero&53&927\ hline 
end{tabular}\

　　15.一个伪代码的实例(Naive Bayes)

egin{algorithm}
caption{Training Naive Bayes Classifier}
label{alg:train_bayes}
	extbf{Input:} The training set with the labels $mathcal{D}={(mathbf{x}_i,y_i)}.$
egin{algorithmic}[1]
STATE $mathcal{V}leftarrow$ the set of distinct words and other tokens found in $mathcal{D}$\
FOR{each target value $c$ in the labels set $mathcal{C}$} 
STATE $mathcal{D}_cleftarrow$ the training samples whose labels are $c$\
STATE $P(c)leftarrowfrac{|mathcal{D}_c|}{|mathcal{D}|}$\
STATE $T_cleftarrow$ a single document by concatenating all training samples in $mathcal{D}_c$\
STATE $n_cleftarrow |T_c|$
FOR{each word $w_k$ in the vocabulary $mathcal{V}$}
STATE $n_{c,k}leftarrow$ the number of times the word $w_k$ occurs in $T_c$\
STATE $P(w_k|c)=frac{n_{c,k}+1}{n_c+|mathcal{V}|}$
ENDFOR
ENDFOR
end{algorithmic}
end{algorithm}