latexmarginpgfplots

Remove white space on right side of pgfplot

Currently I have the following figures (plots):

enter image description here

I have placed the pgfplots inside two subfigures such that I can add the captions. The problem however is that some white space is added on the right side of Figure 3b. I am using the \hfill option but still this white space is note removed. Does someone know how to get rid of this white space such that the righthandside of Figure 3b alligns with the borders of my paper (represented by text text text ...)

My code is as follows:

\documentclass[a4paper, 11pt]{article}
\usepackage[utf8x]{inputenc}
\usepackage[margin=2.5cm]{geometry}
\usepackage{subcaption}
\usepackage{float}
\usepackage{graphicx}
\usepackage{pgfplots}
\usepackage{tikz}
\usetikzlibrary{positioning}
\tikzset{font=\footnotesize}

\begin{document}

\begin{figure}[H]
\centering

\begin{subfigure}{0.49\textwidth}

\begin{tikzpicture}
    \begin{axis}[
        title={},
        xlabel={Epochs},
        ylabel={Rewards},
        ylabel near ticks,
        legend pos=south east,
        ymajorgrids=true,
        grid style=densely dotted,
        width=7cm,
        height=6cm,
        legend cell align={left},
        legend style={font=\footnotesize}
    ]
    \addplot[color = black, line width = 0.25mm, mark = *, mark size = 1] coordinates {
        (1, 1.5)(2, 1.3)
        };
    \addplot[color = black, line width = 0.25mm, mark = none, samples = 2, dashed] {1.4}; % Constant line
    \legend{Plot1,}
    \end{axis}
    \begin{axis}[
        ylabel={Percentage (\%)},
        axis y line*=right,
        ylabel near ticks,
        ylabel style={rotate=-180},
        hide x axis,
        width=7cm,
        height=6cm,
        legend style={font=\footnotesize}
    ]
    \addplot[color = black, mark = *, mark size = 1] coordinates {
    (1, 0.5)(2, 0.6)
    }; 
    \addplot[color = black, line width = 0.25mm, mark = none, samples = 2, dashed] {0.53}; % Constant line
    \legend{Plot2,}
    \end{axis}
\end{tikzpicture}

\caption{Performance}
\label{Plot:}
\end{subfigure}\hfill
\begin{subfigure}{0.49\textwidth}

\begin{tikzpicture}
    \begin{axis}[
        title={},
        xlabel={Epochs},
        ylabel={Rewards},
        ylabel near ticks,
        legend pos=south east,
        ymajorgrids=true,
        grid style=densely dotted,
        width=7cm,
        height=6cm,
        legend cell align={left},
        legend style={font=\footnotesize}
    ]
    \addplot[color = black, line width = 0.25mm, mark = *, mark size = 1] coordinates {
        (1, 1.5)(2, 1.3)
        };
    \addplot[color = black, line width = 0.25mm, mark = none, samples = 2, dashed] {1.4}; % Constant line
    \legend{Plot1,}
    \end{axis}
\end{tikzpicture}

\caption{Action distribution}
\label{Plot:}
\end{subfigure}

\caption{Results}
\label{Plot:}
\end{figure}

\end{document}
Solution

  • The problem is that your plots are about 7 cm wide and you place them in a subfigure of .49\textwidth, so the \hfill you place between the subfigures only sees the objects of .49\textwidth and add fill space according to this. If you want to move the plot towards the right boarder, you could

    a) place the \hfill into the subfigure (the caption won't be centred anymore)

    b) adjust the .49\textwidth to match the actual width of the plot (something around 7 cm)

    (the \fbox{...} in the code below is just to visualize the size of the plots)

    \documentclass[a4paper, 11pt]{article}
\usepackage[utf8x]{inputenc}
\usepackage[margin=2.5cm,showframe]{geometry}
\usepackage{subcaption}
\usepackage{float}
\usepackage{graphicx}
\usepackage{pgfplots}
\usepackage{tikz}
\usetikzlibrary{positioning}
\tikzset{font=\footnotesize}

\begin{document}

\begin{figure}[H]
\centering

\begin{subfigure}{0.49\textwidth}

\fbox{\begin{tikzpicture}
    \begin{axis}[
        title={},
        xlabel={Epochs},
        ylabel={Rewards},
        ylabel near ticks,
        legend pos=south east,
        ymajorgrids=true,
        grid style=densely dotted,
        width=7cm,
        height=6cm,
        legend cell align={left},
        legend style={font=\footnotesize}
    ]
    \addplot[color = black, line width = 0.25mm, mark = *, mark size = 1] coordinates {
        (1, 1.5)(2, 1.3)
        };
    \addplot[color = black, line width = 0.25mm, mark = none, samples = 2, dashed] {1.4}; % Constant line
    \legend{Plot1,}
    \end{axis}
    \begin{axis}[
        ylabel={Percentage (\%)},
        axis y line*=right,
        ylabel near ticks,
        ylabel style={rotate=-180},
        hide x axis,
        width=7cm,
        height=6cm,
        legend style={font=\footnotesize}
    ]
    \addplot[color = black, mark = *, mark size = 1] coordinates {
    (1, 0.5)(2, 0.6)
    }; 
    \addplot[color = black, line width = 0.25mm, mark = none, samples = 2, dashed] {0.53}; % Constant line
    \legend{Plot2,}
    \end{axis}
\end{tikzpicture}}

\caption{Performance}
\label{Plot:}
\end{subfigure}
\begin{subfigure}{0.49\textwidth}
\hfill%
\fbox{\begin{tikzpicture}
    \begin{axis}[
        title={},
        xlabel={Epochs},
        ylabel={Rewards},
        ylabel near ticks,
        legend pos=south east,
        ymajorgrids=true,
        grid style=densely dotted,
        width=7cm,
        height=6cm,
        legend cell align={left},
        legend style={font=\footnotesize}
    ]
    \addplot[color = black, line width = 0.25mm, mark = *, mark size = 1] coordinates {
        (1, 1.5)(2, 1.3)
        };
    \addplot[color = black, line width = 0.25mm, mark = none, samples = 2, dashed] {1.4}; % Constant line
    \legend{Plot1,}
    \end{axis}
\end{tikzpicture}}%
\caption{Action distribution}
\label{Plot:}
\end{subfigure}
\caption{Results}
\label{Plot:}
\end{figure}

\end{document}