What is wrong in this Latex code?

[EngWiPy]

Hi,

I have the following Latex code, which is perfectly working under the class report, but when I change the class report to beamer to make slides, I get errors. Why?

\documentclass{report}
%\documentclass{beamer}
%\setbeamertemplate{navigation symbols}{}
%\setbeamercovered{transparent}
\usepackage[autostyle]{csquotes}
%\usepackage{beamerthemeshadow}
\usepackage{pst-sigsys}
\usepackage{setspace}
\usepackage{dsfont}
%\usepackage[top=2.3cm, bottom=2.5cm, left=2.5cm, right=2.5cm]{geometry}
\usepackage{enumerate}
\usepackage{amsmath}
%\usepackage{mathtools}
\usepackage{graphicx}
\usepackage[hang,scriptsize,bf]{caption}
\usepackage{lettrine}
\usepackage{amsfonts}
\usepackage[printonlyused]{acronym}
\usepackage{amssymb}
\usepackage{multirow}
\usepackage{pifont}
\usepackage{tikz}
\usepackage{epstopdf}
\usepackage{psfrag}
\usepackage{epsfig}
\usepackage[english]{babel}
\usepackage{longtable}
\usepackage{setspace}
\usepackage[autostyle]{csquotes}
\usepackage{fancybox}
%\usecolortheme{crane}
\usetikzlibrary{positioning}
\usetikzlibrary{shapes,arrows,fadings, shadows}
\usetikzlibrary{matrix}

\begin{document}

\tikzset{ 
    table/.style={
        matrix of nodes,
        row sep=-\pgflinewidth,
        column sep=-\pgflinewidth,
        nodes={
            rectangle,
            draw=black,
            align=center
        },
        minimum height=1.5em,
        text depth=0.5ex,
        text height=2ex,
        nodes in empty cells,
%%
        %every even row/.style={
            %nodes={fill=gray!20}
        %},
        column 1/.style={
            nodes={text width=2em,fill=gray!20,font=\bfseries,align=center}
        },
				column 2/.style={
            nodes={text=red}
        },
				column 3/.style={
            nodes={text=blue}
        },
				column 5/.style={
            nodes={text=violet}
        },
        %row 6/.style={
            %nodes={
                %fill=gray!20,
                %%text=black,
                %font=\bfseries
            %}
        %},
				row 5/.style={
            nodes={
                fill=black,
                text=white,
								align=left,
                font=\bfseries
            }
        },
    }
}


%\begin{frame}
%\frametitle{Combining Scheme}
\begin{figure}
\begin{center}
\begin{tikzpicture}

\matrix (first) [table,text width=6em]
{
$\mathbf{x}^{(1)}$   & $x_0^{(1)}$            & $x_1^{(1)}$ & $\cdots$ & $x_{N-1}^{(1)}$ \\
$\mathbf{x}^{(2)}$   & $x_0^{(2)}$            & $x_1^{(2)}$ & $\cdots$ & $x_{N-1}^{(2)}$ \\
$\vdots$             & $\vdots$               & $\vdots$    & $\ddots$ & $\vdots$ \\
$\mathbf{x}^{(M)}$   & |[name=a1]|$x_0^{(M)}$ & |[name=a2]|$x_1^{(M)}$ & $\cdots$ & |[name=a3]|$x_{N-1}^{(M)}$ \\[10mm]
                     & |[name=b1]| & |[name=b2]|&  & |[name=b3]| \\[10mm]
$\mathbf{x}^{(R)}$   & |[name=c1]|$x_0^{(R)}$ & |[name=c2]|$x_1^{(R)}$ & $\cdots$ & |[name=c3]|$x_{N-1}^{(R)}$ \\
};
\draw[->,thick] (a1) edge (b1);
\draw[->,thick] (b1) edge (c1);
\draw[->,thick] (a2) edge (b2);
\draw[->,thick] (b2) edge (c2);
\draw[->,thick] (a3) edge (b3);
\draw[->,thick] (b3) edge (c3);

\end{tikzpicture}
\end{center}
\end{figure}
%\end{frame}

\end {document}

I comment the beamer class and the commands associated with it.

Thanks in advance for your help

 

[Zoli]

Your code works for me. I got no error messages with MikTeX 2.9 using TeXStudio.