pgfplots - 图表中间的中心 ybars

Question

这是我第一次使用 pgfplots，并尝试为论文生成条形图。这是我拥有的源代码，但我想将两组条形图置于图表中间。有什么想法可以做到这一点吗？

\begin{tikzpicture}[trim axis left, trim axis right]
\begin{axis}[
    ybar,
    enlargelimits=0.15,
    legend style={at={(0.5,-0.15)},
      anchor=north,legend columns=-1,},
    ylabel={Negative Log Likelihood},
    symbolic x coords={Dataset 1,Dataset 2},
    xtick=data,
    x tick label style={ align=center},
    ]
\addplot coordinates {(Dataset 1,400) (Dataset 2,751)};
\addplot coordinates {(Dataset 1,391) (Dataset 2,751)};
\addplot coordinates {(Dataset 1,270) (Dataset 2,720)};
\legend{Algo 1,Algo 2,Algo 3}
\end{axis}
\end{tikzpicture}

Answer 1

欢迎光临！类似这样的事吗？

\documentclass[tikz,border=3mm]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.16}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
    ybar,
    enlarge x limits=1,
    legend style={at={(0.5,-0.15)},
      anchor=north,legend columns=-1,},
    ylabel={Negative Log Likelihood},
    symbolic x coords={Dataset 1,Dataset 2},
    xtick=data,
    x tick label style={ align=center},
    ]
\addplot coordinates {(Dataset 1,400) (Dataset 2,751)};
\addplot coordinates {(Dataset 1,391) (Dataset 2,751)};
\addplot coordinates {(Dataset 1,270) (Dataset 2,720)};
\legend{Algo 1,Algo 2,Algo 3}
\end{axis}
\end{tikzpicture}
\end{document}