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%%
%% An UIT Edition example
%%
%% Example 04-18-2 on page 112.
%%
%% Copyright (C) 2012 Vo\ss
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%
% Show page(s) 1,2,3,4,5,6
%% ====
\PassOptionsToClass{}{beamer}
\documentclass{exabeamer}
\usepackage{beramono}
%\StartShownPreambleCommands
%\StopShownPreambleCommands
\begin{document}
\begin{frame}[fragile]{Matrix operations}{Use of \texttt{semiverbatim}}
\setbeamercolor{alerted text}{fg=blue}
\setbeamerfont{alerted text}{series=\bfseries,family=\ttfamily}
\footnotesize\begin{semiverbatim}
\uncover<1->{\alert<0>{\alert<6>{sub \color{red}matrix_row2vector} \{}}
\uncover<2->{\alert<2>{ my $m = shift; my($rows,$cols) = ($m->[1],$m->[2]);}}
\uncover<2->{\alert<2>{ my $r = shift; # optional, which column from matrix}}
\uncover<2->{\alert<2>{ croak "Error: matrix doesn't have 3D rows" unless ($cols==3);}}
\uncover<3->{\alert<3>{ if ( defined $r ) \{}}
\uncover<3->{\alert<3>{ croak "Error:matrix doesn't have that row"unless($r<$rows);}}
\uncover<3->{\alert<3>{ \}}}
\uncover<4->{\alert<4>{ else \{}}
\uncover<4->{\alert<4>{ croak "Error: matrix is not a 3D row matrix"}}
\uncover<4->{\alert<4>{ unless ($rows==1);}}
\uncover<5->{\alert<5>{ $r = 0;}}
\uncover<4->{\alert<4>{ \}}}
\uncover<6->{\alert<6>{ return Math::VectorReal->%
\alert<6>{\color{red}new(@\{$m->[0][$r]\})};}}
\uncover<1->{\alert<1>{\}}}
\end{semiverbatim}
\visible<6>{Note the use of \alert{\color{red}\texttt{shift}}.}
\end{frame}
\end{document}
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