Latex 建立带有竖线和编号的算法环境

Latex 建立带有竖线和编号的算法环境

Latex源码：

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\documentclass{article} \usepackage{amssymb} \usepackage{amsmath} \usepackage[linesnumbered, ruled]{algorithm2e} \SetKwRepeat{Do}{do}{while}% \begin{document} \begin{algorithm}[!ht]   \caption{Algorithm for problem \eqref{WWW} }   \SetKwInOut{Input}{Input}\SetKwInOut{Output}{Output}  \Input  { data matrix ${\bf X}$, label matrix ${\bf Y}$ and ${\bf W}_0$, $k=0$}   \Output  {${\bf W}^*$} \Repeat{ADMM stopping criterion is satisfied}{  Updating ${\bf W}^k$: \begin{equation*} ({\bf X}{\bf X}^{\mathrm T}+\mu{\bf I}){\bf W}={\bf B}^{k-1} \end{equation*} where ${\bf B}^{k-1} ={\bf X}{\bf Y}+\alpha{\bf A}^{k-1}-{\bf \Sigma}^{k-1}+\mu{\bf U}^{k-1}$\; Updating ${\bf U}^k$: \begin{equation*}   {\bf u}^k_i=   \begin{cases}   \frac{\mu\|{\bf n}^{k-1}_i\|_2-\alpha}{\mu\|{\bf n}^{k-1}_i\|_{2}}{\bf n}^{k-1}_i,& ~\mbox{if} ~\alpha<\mu\|{\bf n}^{k-1}_i\|_2 \\   \quad 0 & ~\mbox{otherwise}\\   \end{cases}   \end{equation*}     Updating ${\bf \Sigma}^{k}$: \begin{equation*} \begin{split}   {\bf \Sigma}^k:=&{\bf \Sigma}^{k-1}+\mu({\bf W}^{k-1}-{\bf U}^{k-1})   \end{split} \end{equation*}\\ $k=k+1$\;} \end{algorithm} \end{document}