documentclass{book}


usepackage{caption}
usepackage{subcaption}
usepackage{epsfig}
usepackage{contour}




usepackage{bm}
usepackage{colortbl}
usepackage{enumitem}
usepackage{makecell}
usepackage[font=footnotesize]{caption}
usepackage{forest}
usetikzlibrary{shadows,arrows.meta}
usepackage{pgfplotstable}
%usepackage{filecontents}
usepackage{graphicx}
usepackage{pgfplots}
%pgfplotsset{compat=newest}
pgfplotsset{compat=1.16}
usepackage{smartdiagram}


usetikzlibrary{%
    arrows,%
    calc,%
    arrows.meta,
    fit,%
    patterns,%
    plotmarks,%
    shadows,
    shapes.geometric,%
    shapes.misc,%
    shapes.symbols,%
    shapes.arrows,%
    shapes.callouts,%
    shapes.multipart,%
    shapes.gates.logic.US,%
    shapes.gates.logic.IEC,%
    er,%
    automata,%
    backgrounds,%
    chains,%
    topaths,%
    trees,%
    petri,%
    mindmap,%
    matrix,%
    % calendar,%
    folding,%
    fadings,%
    through,%
    positioning,%
    scopes,%
    decorations.fractals,%
    decorations.shapes,%
    decorations.text,%
    decorations.pathmorphing,%
    decorations.pathreplacing,%
    decorations.footprints,%
    decorations.markings,%
    shadows}
usetikzlibrary{arrows.meta,bending,positioning,calc}


usepackage{listings}
usepackage{color}

begin{document}

begin{figure}

    begin{subfigure}[b]{0.5textwidth}

        begin{tikzpicture}
        begin{axis}[
        width=linewidth,
        line width=0.5,
        grid=major, % Display a grid
        tick label style={font={tiny }},
        legend style={nodes={scale=0.6, transform shape}},
        label style={font={tiny }},
        legend image post style={},
        grid style={white},
        xlabel={Epochs},
        ylabel={RMSE},
        y tick label style={
            /pgf/number format/.cd,
            fixed,
            fixed zerofill,
            precision=2
        },
        legend style={at={(1,0.95)}, anchor=north east, line width=.3pt,mark size=.4pt, draw=none, fill=none}
        ]
        addplot[yellow!85!black,mark=diamond*] table[x expr=coordindex,y index=0] {
        1.1256
        0.9999
        0.9737
        0.9623
        0.9558
        0.9517
        0.9487
        0.9465
        0.9451
        0.9439
        0.943
        0.9425
        0.9416
        0.9411
        0.941
        0.9403
        0.9401
        0.94
        0.9403
        0.9395
        0.94
        0.94
        0.9392
        0.9395
        0.9391
        0.9399
        0.9394
        0.9396
        0.9394
        0.9393
        0.939
        0.939
        0.9392
        0.9393
        0.9389
        0.939
        0.9389
        0.9393
        0.9396
        0.9391
        0.9393
        0.939
        0.9387
        0.9394
        0.9392
        0.9393
        0.9396
        0.939
        0.9388
        0.9392


        };
        addlegendentry{Test error}

        end{axis}

        end{tikzpicture}

        subcaption{ 100K}
        label{fig:sub11}
    end{subfigure}
    begin{subfigure}[b]{0.5textwidth}
        begin{tikzpicture}
        begin{axis}[
        width=linewidth,
        line width=0.5,
        grid=major, % Display a grid
        tick label style={font={tiny}},
        legend style={nodes={scale=0.6, transform shape}},
        label style={font={tiny }},
        legend image post style={},
        grid style={white},
        xlabel={Epochs},
        ylabel={RMSE},
        y tick label style={
            /pgf/number format/.cd,
            fixed,
            fixed zerofill,
            precision=2
        },
        legend style={at={(1,0.95)}, anchor=north east,  draw=none, fill=none},
        ]
        addplot[blue,mark=*] table[x expr=coordindex,y index=0] {
            1.1171
            0.9368
            0.9208
            0.9154
            0.9128
            0.9116
            0.9105
            0.9098
            0.9096
            0.9094
            0.909
            0.9092
            0.909
            0.9089
            0.9087
            0.9088
            0.909
            0.909
            0.9085
            0.9088
            0.9086
            0.9087
            0.9086
            0.9088
            0.9087
            0.9088
            0.9087
            0.9089
            0.9087
            0.9086
            0.9087
            0.9086
            0.9088
            0.9088
            0.9086
            0.9087
            0.9088
            0.9087
            0.9088
            0.9086
            0.9089
            0.9088
            0.9087
            0.9088
            0.9088
            0.9087
            0.9089
            0.9088
            0.9089
            0.9087




        };
        addlegendentry{Test}

        end{axis}

        end{tikzpicture}


        subcaption{1M}
        label{fig:sub22}

    end{subfigure}

    caption{Performance.}
    label{tablex}
end{figure}


end{document}