
\begin{tikzpicture}[scale=0.8]
    \begin{axis}[
        xlabel=$L^y$,
        xtick={0.1, 0.2, 0.3, 0.4},
        xticklabels={1, 2, 3, 4},
        width=4.5cm,
        height=4.5cm,
        y tick label style={
            /pgf/number format/.cd,
            fixed,
            fixed zerofill,
            precision=1,
            /tikz/.cd
        },
        ymin=6.2,
        ymax=6.8,
        x tick label style={rotate=0},
        legend style={font=\small},
        ylabel=\textbf{Recall@10},
        y label style={at={(0.75, 1.03)},rotate=270,anchor=south east},
        ytick distance = 0.2,
        grid=major,
        grid style=dashed,
        ]
        \addplot[mark=square*,blue]  
          coordinates{
            (0.1, 6.25) (0.2, 6.43) (0.3, 6.59) (0.4, 6.63)
        };
    \end{axis}
\end{tikzpicture}
\hspace{5mm}
\begin{tikzpicture}[scale=0.8]
    \begin{axis}[
        xlabel=$L^y$,
        xtick={0.1, 0.2, 0.3, 0.4},
        xticklabels={1, 2, 3, 4},
        width=4.5cm,
        height=4.5cm,
        y tick label style={
            /pgf/number format/.cd,
            fixed,
            fixed zerofill,
            precision=1,
            /tikz/.cd
        },
        ymin=4.9,
        ymax=5.5,
        x tick label style={rotate=0},
        legend style={font=\small},
        ylabel=\textbf{NDCG@10},
        y label style={at={(0.75, 1.03)},rotate=270,anchor=south east},
        ytick distance = 0.2,
        grid=major,
        grid style=dashed,
        ]
        \addplot[mark=triangle*,red]
          coordinates{
            (0.1, 5.01) (0.2, 5.09) (0.3, 5.25) (0.4, 5.35)
        };
    \end{axis}
\end{tikzpicture}