How can I draw those line joining matrix

I'm trying to draw something like this : I have created matrix normally, from here :

\begin{bmatrix}
x_{11}       & x_{12} & x_{13} & \dots & x_{1n} \\
x_{21}       & x_{22} & x_{23} & \dots & x_{2n} \\
\hdotsfor{5} \\
x_{d1}       & x_{d2} & x_{d3} & \dots & x_{dn}
\end{bmatrix}

But it doesn't give that 3D feeling and how can I create the those line between those matrices.

Welcome! You can use tikz-3dplot to install a view and the 3d library of TikZ, which automatically gets loaded, to project the matrices on some planes.

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz}
\usepackage{tikz-3dplot}
\begin{document}
\tdplotsetmaincoords{65}{60}
\begin{tikzpicture}[tdplot_main_coords]
\begin{scope}[canvas is xz plane at y=2,transform shape]
\node[inner xsep=-3pt,inner ysep=-0.3pt] (mat1){$\displaystyle \begin{bmatrix} x_{11} & x_{12} \\ x_{21} & x_{22} \\ \end{bmatrix}$};
\end{scope}
%
\begin{scope}[canvas is xz plane at y=0,transform shape]
\node[inner xsep=-4pt,inner ysep=-0.3pt] (mat2){$\displaystyle \begin{bmatrix} x_{11} & x_{12} & x_{13} & \dots & x_{1n} \\ x_{21} & x_{22} & x_{23} & \dots & x_{2n} \\ \hdotsfor{5} \\ x_{d1} & x_{d2} & x_{d3} & \dots & x_{dn} \end{bmatrix}$};
\end{scope}
\foreach \Y in {south,north} {\foreach \X in {west,east}
{\draw (mat1.\Y\space\X)  -- (mat2.\Y\space\X);}}
\end{tikzpicture}
\end{document} One can also install the background pattern.

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz}
\usepackage{tikz-3dplot}
\usetikzlibrary{backgrounds}
\begin{document}
\tdplotsetmaincoords{65}{60}
\begin{tikzpicture}[tdplot_main_coords]
\begin{scope}[canvas is xz plane at y=2,transform shape]
\node[inner xsep=-3pt,inner ysep=-0.3pt] (mat1){$\displaystyle \begin{bmatrix} x_{11} & x_{12} \\ x_{21} & x_{22} \\ \end{bmatrix}$};
\end{scope}
%
\begin{scope}[canvas is xz plane at y=0,transform shape]
\node[inner xsep=-4pt,inner ysep=-0.3pt] (mat2){$\displaystyle \begin{bmatrix} x_{11} & x_{12} & x_{13} & x_{14} \\ x_{21} & x_{22} & x_{23} & x_{24} \\ x_{31} & x_{32} & x_{33} & x_{34} \\ x_{41} & x_{42} & x_{43} & x_{44} \\ \end{bmatrix}$};
\end{scope}
%
\begin{scope}[on background layer]
\foreach \Y in {south,north} {\foreach \X in {west,east}
{\draw (mat1.\Y\space\X)  -- (mat2.\Y\space\X);}}
\foreach \X in {1,2}
{\fill[blue!20] (mat\X.west)  -- (mat\X.east) -- (mat\X.south east)
-- (mat\X.south) -- (mat\X.north) -- (mat\X.north west) -- cycle; }
\end{scope}
\end{tikzpicture}
\end{document} You seem to have problems with installing tikz-3dplot. While there should not be a problem, here is a possible workaround. Save this file as tikzlibrary3dtools.code.tex in the same directory as the file you are compiling. Then this should work, too:

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz}
\usetikzlibrary{backgrounds,3d,3dtools}
\begin{document}
\begin{tikzpicture}[3d/install view={phi=70,psi=0,theta=70}]
\begin{scope}[canvas is xz plane at y=2,transform shape]
\node[inner xsep=-3pt,inner ysep=-0.3pt] (mat1){$\displaystyle \begin{bmatrix} x_{11} & x_{12} \\ x_{21} & x_{22} \\ \end{bmatrix}$};
\end{scope}
%
\begin{scope}[canvas is xz plane at y=0,transform shape]
\node[inner xsep=-4pt,inner ysep=-0.3pt] (mat2){$\displaystyle \begin{bmatrix} x_{11} & x_{12} & x_{13} & x_{14} \\ x_{21} & x_{22} & x_{23} & x_{24} \\ x_{31} & x_{32} & x_{33} & x_{34} \\ x_{41} & x_{42} & x_{43} & x_{44} \\ \end{bmatrix}$};
\end{scope}
%
\begin{scope}[on background layer]
\foreach \Y in {south,north} {\foreach \X in {west,east}
{\draw (mat1.\Y\space\X)  -- (mat2.\Y\space\X);}}
\foreach \X in {1,2}
{\fill[blue!20] (mat\X.west)  -- (mat\X.east) -- (mat\X.south east)
-- (mat\X.south) -- (mat\X.north) -- (mat\X.north west) -- cycle; }
\end{scope}
\end{tikzpicture}
\end{document}

Notice that the conventions for the angles may change in future revisions of the library. The problem is that different packages follow different conventions, which applies to e.g. tikz-3dplot and pgfplots. It is not clear what the "best" convention is. However, translating between these conventions is a pain.

• Found it here. I couldn't install it : **LaTeX Error File `tikz-3dplot.sty' not found. Type X to quit or <RETURN> to proceed, or enter new name. (Default extension: sty) Enter file name: ** Oct 4 '19 at 8:04
• @MaifeeUlAsad AFAIK tikz-3dplot is par of any standard TeX installation. How did you install LaTeX? Note that I am only using it to install a view, so in principle one could achieve the result also by installing the view with e.g. this experimental library.
– user194703
Oct 4 '19 at 14:55
• I installed TeXworkd and that isntalled MiKtex.. Oct 8 '19 at 10:56