a matrix of tikz objects

Question

I use the following code to draw a tikz object.

\begin{tikzpicture}

    % Axis
    \draw (-0.5,0) -- (5.0,0);
    \draw (0,-0.5) -- (0,2.5);

    \node (rect) at (1.5,2) [draw,minimum height=0.65cm,minimum width=2cm,fill=gray!50] {};
    \node (rect) at (2.5,1) [draw,minimum height=0.65cm,minimum width=3cm,fill=gray!50] {};

\end{tikzpicture}

and the object looks like -

What I would like to have is grid of such objects. So that in the grid at every location (1,1), (1,2)... (n,n) this object should be drawn.

Of course I can copy paste this code using scope and use xshift, yshift in order to place many of them. What I need to see how 10 x 10 grid or even 100 x 100 grid of such objects. However I would like to use a for loop to draw this grid of tikz nodes. I want to use the for loop mentioned in this question. However my tikz node consists of multiple nodes (2 lines and 2 rectangles).

Is it possible to draw the grid of objects using for loop?

Answer 1

It is indeed possible

\begin{tikzpicture}
  \foreach \x in {1,2,3}{
    \foreach \y in {1,2,3}{
    \begin{scope}[shift={(3*\x,2*\y)}]
      \draw (-0.25,0) -- (2.5,0);
      \draw (0,-0.25) -- (0,1.25);
      \node (rect) at (.75,1) [draw,minimum height=0.325cm,minimum width=1cm,fill=gray!50] {};
      \node (rect) at (1.25,.5) [draw,minimum height=0.325cm,minimum width=1.5cm,fill=gray!50] {};
    \end{scope}
    }
  }
\end{tikzpicture}

Open for comments or better solutions!

Answer 2

Just another solution with pics which can be used within foreach loops or matrix.

\documentclass[border=2mm,tikz]{standalone}

\tikzset{
    myobject/.pic={
      \draw (-0.25,0) -- (2.5,0);
      \draw (0,-0.25) -- (0,1.25);
      \node (rect) at (.75,1) [draw,minimum height=0.325cm,minimum width=1cm,fill=gray!50] {};
      \node (rect) at (1.25,.5) [draw,minimum height=0.325cm,minimum width=1.5cm,fill=gray!50] {};
        }
}

\begin{document}

\begin{tikzpicture}
  \foreach \x in {1,2,3}{
    \foreach \y in {1,2,3}{
    \begin{scope}[shift={(3*\x,2*\y)}]
      \pic{myobject};
    \end{scope}
    }
  }
\end{tikzpicture}

\begin{tikzpicture}
  \matrix [column sep=3mm, row sep=3mm] {
      \pic{myobject}; &  \pic{myobject}; &  \pic{myobject}; \\
      \pic{myobject}; &  \pic{myobject}; &  \pic{myobject}; \\
      \pic{myobject}; &  \pic{myobject}; &  \pic{myobject}; \\
    };
\end{tikzpicture}

\end{document}