Latex 建立带有竖线和编号的算法环境

Posted 2020-08-10 华东 博客

Latex 建立带有竖线和编号的算法环境

Latex源码：

\\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}