กราฟแท่งด้วย pgfplots

\begin{tikzpicture}
  \begin{axis}[
      ybar, ymin=0,
      symbolic x coords={Mon, Tue, Wed, Thu, Fri},
      xtick=data,
      ylabel={Visitors},
      enlarge x limits=0.15,
    ]
    \addplot coordinates {(Mon,44) (Tue,31) (Wed,38) (Thu,27) (Fri,40)};
  \end{axis}
\end{tikzpicture}

\begin{tikzpicture}
  \begin{axis}[
      ybar, ymin=0, ymax=55, bar width=12pt,
      symbolic x coords={Erika, Hans, John},
      xtick=data, enlarge x limits=0.25,
      nodes near coords,
      ylabel={Points},
      legend style={at={(0.5,-0.12)}, anchor=north, legend columns=2},
    ]
    \addplot coordinates {(Erika,44) (Hans,31) (John,38)};
    \addplot coordinates {(Erika,40) (Hans,36) (John,29)};
    \legend{Round 1, Round 2}
  \end{axis}
\end{tikzpicture}

\begin{tikzpicture}
  \begin{axis}[
      ybar stacked, ymin=0, bar width=16pt,
      symbolic x coords={Q1, Q2, Q3, Q4},
      xtick=data, enlarge x limits=0.2,
      legend pos=north west, ylabel={Sales},
    ]
    \addplot coordinates {(Q1,12) (Q2,18) (Q3,15) (Q4,22)};
    \addplot coordinates {(Q1,6) (Q2,9) (Q3,12) (Q4,10)};
    \legend{Online, In store}
  \end{axis}
\end{tikzpicture}

\begin{tikzpicture}
  \begin{axis}[
      xbar, xmin=0, xmax=50,
      symbolic y coords={Rust, Python, C},
      ytick=data, enlarge y limits=0.3,
      nodes near coords, xlabel={Projects},
      width=8cm, height=5cm,
    ]
    \addplot coordinates {(44,Rust) (31,Python) (12,C)};
  \end{axis}
\end{tikzpicture}

\begin{tikzpicture}
  \begin{axis}[
      ybar, ymin=0, xtick=data, enlarge x limits=0.25,
      x tick label style={/pgf/number format/1000 sep=},
    ]
    \addplot coordinates {(2023,18) (2024,31) (2025,44)};
  \end{axis}
\end{tikzpicture}