%%%------------------------------------------------------------------------------------------------------------
\begin{tikzpicture}
\begin{scope}
\setcounter{mycount1}{1}
\draw[step=0.5cm,thick] (0,-0) grid (1.5,0.5);
\foreach \x in {0.25,0.75,1.25}{
    \node [fill=green!15,inner sep=0pt,minimum height=0.49cm,minimum width=0.49cm](vector1) at (\x,0.25) {$\number\value{mycount1}$};
    \addtocounter{mycount1}{1};
}
\node [anchor=north] (labela) at ([xshift=-1.2em,yshift=-0em]vector1.south) {\footnotesize{(a) }};
\end{scope}

\begin{scope}[xshift=1.2in]
\draw[step=0.5cm,thick] (0,-0) grid (3.0,0.5);
\setcounter{mycount2}{1}
\foreach \x in {0.25,0.75,1.25}{
    \node [fill=green!15,inner sep=0pt,minimum height=0.49cm,minimum width=0.49cm] (vector2)at (\x,0.25) {$\number\value{mycount2}$};
    \addtocounter{mycount2}{1};
}
\foreach \x in {1.75,2.25,2.75}{
    \node [fill=red!15,inner sep=0pt,minimum height=0.49cm,minimum width=0.49cm] at (\x,0.25) {$\number\value{mycount2}$};
    \addtocounter{mycount2}{1};
}
\node [anchor=north] (labelb) at ([xshift=0.3em,yshift=-0em]vector2.south) {\footnotesize{(b) }};
\end{scope}

\begin{scope}[yshift=-0.6in]
\draw[step=0.5cm,thick] (0,-0) grid (6.0,0.5);
\setcounter{mycount3}{1}
\foreach \x in {0.25,0.75,1.25}{
    \node [fill=green!15,inner sep=0pt,minimum height=0.49cm,minimum width=0.49cm] at (\x,0.25) {$\number\value{mycount3}$};
    \addtocounter{mycount3}{1};
}
\foreach \x in {1.75,2.25,2.75}{
    \node [fill=red!15,inner sep=0pt,minimum height=0.49cm,minimum width=0.49cm] at (\x,0.25) {$\number\value{mycount3}$};
    \addtocounter{mycount3}{1};
}
\foreach \x in {3.25,3.75,4.25}{
    \node [fill=green!15,inner sep=0pt,minimum height=0.49cm,minimum width=0.49cm] at (\x,0.25) {$\number\value{mycount3}$};
    \addtocounter{mycount3}{1};
}
\foreach \x in {4.75,5.25,5.75}{
    \node [fill=red!15,inner sep=0pt,minimum height=0.49cm,minimum width=0.49cm] at (\x,0.25) {$\number\value{mycount3}$};
    \addtocounter{mycount3}{1};
}
\draw[decorate,thick,decoration={brace,mirror,raise=0.2em}] (0,-0.2) -- (2.95,-0.2);
\draw[decorate,thick,decoration={brace,mirror,raise=0.2em}] (3.05,-0.2) -- (6,-0.2);
\node [anchor=north] (subtensor1) at (1.5,-0.4) {\footnotesize{$3 \times 2$ sub-tensor}};
\node [anchor=north] (subtensor1) at (4.5,-0.4) {\footnotesize{$3 \times 2$ sub-tensor}};
\node [anchor=north] (labelc) at (3,-0.8) {\footnotesize{(c)}};
\end{scope}

\end{tikzpicture}
%%%------------------------------------------------------------------------------------------------------------