Why are vertical rules dashed sometimes with algorithmic package?

Question

I would like to create vertical rules for indentation with algorithmic package. I applied the solution proposed here How can I create vertical lines indentation in algorithm pseudo code correctly without end keywords?

However, when I applied this solution I get dashed vertical lines as follows:

and the amount of dashes increase as the code increase.

My LaTeX code is the following:

\documentclass[12pt,journal,compsoc,onecolumn]{IEEEtran}

\usepackage[lite,subscriptcorrection,slantedGreek,nofontinfo]{mtpro2}
\usepackage{algorithm}
\usepackage[noend]{algpseudocode}
\usepackage{etoolbox}

\makeatletter
\def\BState{\State\hskip-\ALG@thistlm}
\renewcommand{\algorithmicrequire}{\textbf{Input:}}
\renewcommand{\algorithmicensure}{\textbf{Output:}}
% start with some helper code
% This is the vertical rule that is inserted
\newcommand*{\algrule}[1][\algorithmicindent]{%
    \makebox[#1][l]{%
        \hspace*{.2em}% <------------- This is where the rule starts from
        \vrule height .75\baselineskip depth .25\baselineskip
    }
}

\newcount\ALG@printindent@tempcnta
\def\ALG@printindent{%
    \ifnum \theALG@nested>0% is there anything to print
    \ifx\ALG@text\ALG@x@notext% is this an end group without any text?
    % do nothing
    \else
    \unskip
    % draw a rule for each indent level
    \ALG@printindent@tempcnta=1
    \loop
    \algrule[\csname ALG@ind@\the\ALG@printindent@tempcnta\endcsname]%
    \advance \ALG@printindent@tempcnta 1
    \ifnum \ALG@printindent@tempcnta<\numexpr\theALG@nested+1\relax
    \repeat
    \fi
    \fi
}
% the following line injects our new indent handling code in place of the default spacing
\patchcmd{\ALG@doentity}{\noindent\hskip\ALG@tlm}{\ALG@printindent}{}{\errmessage{failed to patch}}
\patchcmd{\ALG@doentity}{\item[]\nointerlineskip}{}{}{} % no spurious vertical space
% end vertical rule patch for algorithmicx
\makeatother

\begin{document}

\begin{algorithm}
    \caption{Arbitrary Algorithm}\label{IS}

    \begin{algorithmic}[1]
        \Require A matrix $\mathbf{A}$ of size $m\times n$.
        \Ensure Something.
        \For{$i$ in $m$}
            \For{$j$ in $n$}
                \If{$i=j$}
                    \State Select a random action
                \Else
                \If{$i=j+1$}
                    \State Stay silent 
                \Else 
                    \State Break
                \EndIf
                \EndIf
            \EndFor
        \EndFor
    \end{algorithmic}

\end{algorithm}



\begin{algorithm}
    \caption{\textsc{Increase Algorithm}}
    \label{algo:ffig}
    \begin{algorithmic}[1]
        \Require{$T$.}
        \Ensure{A pair.}

        \For{$\ell\gets1$ \textbf{to} $L$}
            \For{$t\gets1$ \textbf{to} $T$}     
                \State $x_\ell^t\gets 0$
            \EndFor
        \EndFor         
        \For{$\ell\gets 1$ \textbf{to} $L$}
            \For{$t\gets1$ \textbf{to} $T$}
                \State $x_\ell^t\gets 1$
                \State $S_\ell^t\gets 0$
                \For{$\ell'\gets1$ \textbf{to} $L$}
                    \State $S_\ell^t\gets S_\ell^t + t$
                \EndFor

            \EndFor
        \EndFor
        \State \Return The solution
    \end{algorithmic}
\end{algorithm}


\end{document}

score 3 · Accepted Answer · answered Mar 29 '16 at 22:12

The problem is in two consecutive lines having high and deep symbols.

You can cure it by using a slightly larger depth of the rule:

\newcommand*{\algrule}[1][\algorithmicindent]{%
    \makebox[#1][l]{%
        \hspace*{.2em}% <------------- This is where the rule starts from
        \vrule height .75\baselineskip depth .3\baselineskip
    }
}

In the example I did \usepackage[sc]{mathpazo} instead of loading mtpro2: Times math fonts don't go along with the Palatino font used by the class, but the result is the same with mtpro2.

Why are vertical rules dashed sometimes with algorithmic package?

1 Answers1

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