[Tex/LaTex] Line numbering in algorithmic

algorithmicxalgorithmsbeamerline-numbering

I want to change the first number of the line numbering in my algorithm, but how is it done?
This is my example:

\documentclass[12pt]{beamer}
\usepackage{amsmath, amsfonts, amssymb, amsthm}
\usepackage{algorithmic, algorithm}
\usepackage{float}
\renewcommand\thealgorithm{}

    \begin{document}
    \begin{frame}[t, fragile]
    \frametitle{...}
       \begin{algorithm}[H]
       \caption{...}
       \begin{algorithmic}[1]
          \STATE ...
       \end{algorithmic}
       \end{algorithm}
    \end{frame}
    \end{document}

The first state should be numbered with 2 for example.

Best Answer

The line number in algorithmic (from the algorithms bundle) is governed by the counter ALC@line. The following MWE defines \setalglineno{<num>} which allows you to modify the number of any line in your algorithmic:

Screenshot of Algorithm starting at line 2

\documentclass[12pt]{beamer}

\usepackage{algorithmic,algorithm,float}

\renewcommand\thealgorithm{}
\newcommand{\setalglineno}[1]{%
  \setcounter{ALC@line}{\numexpr#1-1}}

\begin{document}

\begin{frame}[t, fragile]
  \frametitle{...}
  \begin{algorithm}[H]
    \caption{...}
    \begin{algorithmic}[1]
      \setalglineno{2}% Set following line number to 2
      \STATE ...
    \end{algorithmic}
  \end{algorithm}
\end{frame}

\end{document}

In fact, \setalglineno{<num>} sets ALC@line to <num>-1, since the algorithm is set in a list, where each line counter is incremented before it is set. So, technically, to obtain a line numbered 2, you need to set the counter value to 1.

A similar setup would be used within the algpseudocode (or equivalent) environments offered by algorithmicx. For these you have to use ALG@line instead of ALC@line though.

Related Solutions

[Tex/LaTex] latex beamer appendix numbering

This is so, because \insertsectionnumber is defined as (in the file beamerbasesection.sty)

\def\insertsectionnumber{\@arabic\c@section}

And \appendix doesn't change this;

\newcommand<>\appendix{%
  \only#1{\part{\appendixname}
  \addtocontents{nav}{\protect\headcommand{\protect\beamer@appendixpages{\the\c@page}}}}}

so the counter will appear using arabic representation.

You can change this, redefining \insertsectionnumber in the proper location:

\setcounter{section}{0}
\renewcommand\insertsectionnumber{\Alph{section}}

Perhaps you want to let \appendix do this change:

\documentclass{beamer}

\makeatletter
\renewcommand<>\appendix{%
\setcounter{section}{0}%
\renewcommand\insertsectionnumber{\Alph{section}}%
  \only#1{\part{\appendixname}
  \addtocontents{nav}{\protect\headcommand{\protect\beamer@appendixpages{\the\c@page}}}}}
\makeatother

\begin{document}

\section{test1}
\begin{frame}{\insertsectionnumber.~\insertsection}
 bal bla
\end{frame}

\appendix

\section{test2}
\begin{frame}{\insertsectionnumber.~\insertsection}
 bla bla
\end{frame}

\end{document}

[Tex/LaTex] Algorithm as figure and without italic and bold formatting

Is this what you are trying to achieve?

enter image description here

This is the MWE:

\documentclass{article}
\usepackage[plain]{algorithm}
\usepackage{algpascal}

\begin{document}

\algrenewcommand\textkeyword{\textrm}
\algdef{SE}{For}{End}[2]{%
  \textkeyword{for} \(#1\) \textkeyword{to} \(#2\) \textkeyword{do begin}}{%
  \textkeyword{end}}

\begin{algorithm}
\begin{algorithmic}[1]
\State Assign an ordering $A_{1}, ..., A_{n}$ to the nonterminals of the grammar.
\For{i = 1}{n}
    \For{j = 1}{i-1}
    \State for each production of the form $A_{i} \rightarrow A_{j} \alpha$
    \End
\End
\end{algorithmic}
\caption{Paull's algorithm}
\end{algorithm}

\end{document}

Explanation

To match your first two requests, I've redefined the behavior of for to have an end statement by adding the lines:

\algdef{SE}{For}{End}[2]{%
  \textkeyword{for} \(#1\) \textkeyword{to} \(#2\) \textkeyword{do begin}}{%
  \textkeyword{end}}

To match your last request, it suffices to add the line:
```
\algrenewcommand\textkeyword{\textrm}
```
which redefines the font for keywords to be \textrm instead of \textbf.
In regards of your 3rd request, there are two ways.
- If you want the algorithm to behave as an algorithm, simply load the algorithm package with the option plain as in the above MWE:
```
\usepackage[plain]{algorithm}
```
- If you want the algorithm to behave as a figure, there is no need to load the algorithm package, simply insert the algorithmic environment inside a figure, i.e. replace the lines
```
\begin{algorithm}
\begin{algorithmic}[1]
...
\end{algorithmic}
\caption{Paull's algorithm}
\end{algorithm}
```
  with
```
\begin{figure}
\begin{algorithmic}[1]
...
\end{algorithmic}
\caption{Paull's algorithm}
\end{figure}
```
  and you will have

Addendum

This is the complete implementation of the algorithm in the figure:

\documentclass{article}
\usepackage[plain]{algorithm}
\usepackage{algpascal}

\begin{document}

\algrenewcommand\textkeyword{\textrm}
\algdef{SE}{For}{End}[2]{%
  \textkeyword{for} \(#1\) \textkeyword{to} \(#2\) \textkeyword{do begin}}{%
  \textkeyword{end}}
\algdef{SE}{ForEach}{End}[1]{%
  \textkeyword{for each} #1 \textkeyword{do begin}}{%
  \textkeyword{end}}

\begin{algorithm}
\begin{algorithmic}[1]
\State Assign an ordering $A_{1}, \dots, A_{n}$ to the nonterminals of the grammar.
\For{i := 1}{n}
    \For{j := 1}{i-1}
        \ForEach{production of the form $A_{i} \rightarrow A_{j} \alpha$}
            \State remove $A_{i} \rightarrow A_{j} \alpha$ from the grammar
            \ForEach{production of the form $A_{j} \rightarrow \beta$}
                \State add $A_{i} \rightarrow \beta\alpha$ to the grammar
            \End
        \End
    \End
    \State transform the $A_{i}$-productions to eliminate direct left recursion
\End
\end{algorithmic}
\caption{Paull's algorithm}
\end{algorithm}

\end{document}

enter image description here

There is the need to define a new command \ForEach:

\algdef{SE}{ForEach}{End}[1]{%
  \textkeyword{for each} #1 \textkeyword{do begin}}{%
  \textkeyword{end}}

Note that I've defined \ForEach so to take one "text" argument, because it seemed to me the best way to define it.

If you want it to take a "math" argument, then define it as

\algdef{SE}{ForEach}{End}[1]{%
  \textkeyword{for each} \(#1\) \textkeyword{do begin}}{%
  \textkeyword{end}}

and use it as follows (amsmath is needed for the command \text):

\ForEach{\text{production of the form }A_{i} \rightarrow A_{j} \alpha}