LaTeX算法排版例子
1）首先在导言区加入语句：
\usepackage{algorithm}\usepackage{algorithmic}
2）例1
\begin{algorithm}\caption{A}\label{alg:A}\begin{algorithmic}\STATE {set $r(t)=x(t)$} \REPEAT \STATE set $h(t)=r(t)$ \REPEAT\STATE set $h(t)=r(t)$ \UNTIL{B} \UNTIL{B}\end{algorithmic}\end{algorithm}排版结果如下：
3）例2
\begin{algorithm}\caption{Calculate $y = x^n$} \label{alg1}\begin{algorithmic}\REQUIRE $n \geq 0 \vee x \neq 0$ \ENSURE $y = x^n$ \STATE $y \Leftarrow 1$ \IF{$n < 0$} \STATE $X \Leftarrow 1 / x$ \STATE $N \Leftarrow -n$ \ELSE \STATE $X \Leftarrow x$ \STATE $N \Leftarrow n$\ENDIF \WHILE{$N \neq 0$} \IF{$N$ is even} \STATE $X \Leftarrow X \times X$ \STATE $N \Leftarrow N / 2$ \ELSE[$N$ is odd] \STATE $y \Leftarrow y \times X$ \STATE $N \Leftarrow N - 1$ \ENDIF \ENDWHILE\end{algorithmic}\end{algorithm}排版结果如下：
4）\renewcommand 改变现有命令的定义。在导言区加入如下语句：
\renewcommand{\algorithmicrequire}{ \textbf{Input:}} %Use Input in the format of Algorithm\renewcommand{\algorithmicensure}{ \textbf{Output:}} %UseOutput in the format of Algorithm使得原来软件包中定义的命令\REQUIRE和\ENSURE显示为Input:和Output:
一个例子如下：
\begin{algorithm}[htb] \caption{ Framework of ensemble learning for our system.} \label{alg:Framwork} \begin{algorithmic}[1] %这个1 表示每一行都显示数字\REQUIRE ~~\\ %算法的输入参数：InputThe set of positive samples for current batch, $P_n$;\\The set of unlabelled samples for current batch, $U_n$;\\Ensemble of classifiers on former batches, $E_{n-1}$;\ENSURE ~~\\ %算法的输出：OutputEnsemble of classifiers on the current batch, $E_n$;\STATE Extracting the set of reliable negative and/or positive samples $T_n$ from $U_n$ with help of $P_n$; \label{ code:fram:extract }%对此行的标记，方便在文中引用算法的某个步骤\STATE Training ensemble of classifiers $E$ on $T_n \cup P_n$, with help of data in former batches; \label{code:fram:trainbase}\STATE $E_n=E_{n-1}\cup E$; \label{code:fram:add}\STATE Classifying samples in $U_n-T_n$ by $E_n$; \label{code:fram:classify}\STATE Deleting some weak classifiers in $E_n$ so as to keep the capacity of $E_n$; \label{code:fram:select}\RETURN $E_n$; %算法的返回值\end{algorithmic}\end{algorithm}排版结果如下：
5）最后一个例子
\begin{algorithm}[h]\caption{An example for format For \& While Loop in Algorithm}\begin{algorithmic}[1]\FOR{each $i \in [1,9]$}\STATE initialize a tree $T_{i}$ with only a leaf (the root);\\STATE $T=T \cup T_{i};$\\ENDFOR\FORALL {$c$ such that $c \in RecentMBatch(E_{n-1})$} \label{code:TrainBase:getc}\STATE $T=T \cup PosSample(c)$; \label{code:TrainBase:pos}\ENDFOR\FOR{$i=1$; $i<n$; $i++$ }\STATE $//$ Your source here;\ENDFOR\FOR{$i=1$ to $n$}\STATE $//$ Your source here;\ENDFOR\STATE $//$ Reusing recent base classifiers. \label{code:recentStart}\WHILE {$(|E_n| \leq L_1 )and( D \neq \phi)$}\STATE Selecting the most recent classifier $c_i$ from $D$;\STATE $D=D-c_i$;\STATE $E_n=E_n+c_i$;\ENDWHILE \label{code:recentEnd}\end{algorithmic}\end{algorithm}排版结果如下：