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Could you help me please how can I write a piece of pseudocode with function in latex?

    \begin{algorithmic}
\STATE $\mathrm{maxWeight} \leftarrow \mathrm{value of e.weight where e has maximum value of weight from all elements}$
\STATE $\mathrm{minWeight} \leftarrow \mathrm{value of e.weight where e has minimum value of weight from all elements}$
\STATE $\mathrm{maxDrawValue} \leftarrow \mathrm{value of element maximum size in visualization}$
\STATE $\mathrm{minDrawValue} \leftarrow \mathrm{ value of element minimum size in visualization}$
\Function{CountDrawValue}{elementWeight}
  \IF maxWeight = minWeight
\RETURN $\frac{maxWeight + minWeight}{2}$
\EndFunction
\end{algorithmic}

I get error message 

! Undefined control sequence.
l.631 \Function
               {CountDrawValue}{elementWeight}
?
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  • Please provide a minimal working example, i.e., complete code that either works or that you expect to work. Right now we have no idea what package you are using that provides the algorithmic environment. Commented Dec 22, 2014 at 21:52

1 Answer 1

Reset to default
5

Perhaps you're after something that looks like this:

enter image description here

\documentclass{article}
\usepackage{algpseudocode,amsmath}
\newcommand{\var}{\texttt}
\newcommand{\assign}{\leftarrow}
\newcommand{\multilinestate}[1]{%
  \parbox[t]{\linewidth}{\raggedright\hangindent=\algorithmicindent\hangafter=1
    \strut#1\strut}}
\begin{document}

\begin{algorithmic}
  \State \multilinestate{$\var{maxWeight} \assign{}$value of \var{e.weight} where~\var{e} has maximum value of weight from all elements}
  \State \multilinestate{$\var{minWeight} \assign{}$value of \var{e.weight} where~\var{e} has minimum value of weight from all elements}
  \State $\var{maxDrawValue} \assign{}$value of element maximum size in visualization
  \State $\var{minDrawValue} \assign{}$value of element minimum size in visualization
  \Function{CountDrawValue}{\var{elementWeight}}
    \If{$\var{maxWeight} = \var{minWeight}$}
      \State\Return $(\var{maxWeight} + \var{minWeight}) / 2$
    \EndIf
  \EndFunction
\end{algorithmic}

\end{document}

\Function is supplied by algpseudocode, while the use of \STATE is only available through algcompatible or algorithmic. I've converted your input to something that is totally compatible with algpseudocode.

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