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\begin{figure}
\centering
\begin{subfigure}[b]{0.49\textwidth}
\centering
\begin{adjustbox}{width=\textwidth, height=0.25\textheight}
\begin{tikzpicture}
\begin{axis}[tick style = {draw = none}, xticklabel = \empty,
yticklabel=\empty]
\addplot [mark options={scale = 0.7}, mark = o] table
[x=x_d,y=y_d, col sep = comma] {Figures/Data/sin_conv.csv};
\addplot [red, mark=x] table [x=x_i, y=y_i, col sep=comma, color ='black'] {Figures/Data/sin_conv.csv};
\end{axis}
\end{tikzpicture}
\end{adjustbox}
\caption{True position (\textcolor{red}{red}), distorted position data (black)}
\end{subfigure}
\hfill
\begin{subfigure}[b]{0.49\textwidth}
\centering
\begin{adjustbox}{width=\textwidth, height=0.25\textheight}
\begin{tikzpicture}
\begin{axis}[tick style = {draw = none}, xticklabel = \empty,
yticklabel=\empty]
\addplot [mark options={scale = 0.7}, mark = o] table [x=x,y=y, col
sep = comma] {Figures/Data/sin_conv.csv};
\addplot [red, mark=x] table [x=x_i, y=y_i, col sep=comma, color ='black'] {Figures/Data/sin_conv.csv};
\end{axis}
\end{tikzpicture}
\end{adjustbox}
\caption{True position (\textcolor{red}{red}), filtered position data (black)}
\end{subfigure}
\caption[Signal Smoothing Using Convolution]{Example for noise reduction using convolution with simulated
positional data. As filter
$g(i)=\left(\nicefrac{1}{3},\nicefrac{1}{4},\nicefrac{1}{5},\nicefrac{1}{6},\nicefrac{1}{20}\right)_{(i-1)}$
is chosen and applied to the $x$ and $y$ coordinate
data separately. The convolution of both signals with $g$
improves the MSE of the positions from 0.196 to 0.170 and
visibly smoothes the data.
}
\label{fig:sin_conv}
\end{figure}
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