\begin{tikzpicture}
\begin{axis}[
width=4.52in,
height=3.56in,
scale only axis,
separate axis lines,
every outer x axis line/.append style={white!15!black},
every x tick label/.append style={font=\color{white!15!black}},
xmin=0.00,
xmax=20.00,
ymin=-1.00,
ymax=1.00,
xlabel={},
ylabel={},
xmajorgrids,
ymajorgrids,
every outer y axis line/.append style={white!15!black},
every y tick label/.append style={font=\color{white!15!black}},
legend style={draw=white!15!black,fill=white,legend cell align=left}]
\definecolor{matlabColor1}{rgb}{0.000000,0.000000,1.000000}
\addplot [color=matlabColor1, only marks, line width=1.5pt, mark=*, mark size=2pt, forget plot]
table[row sep=crcr]{
	0 1 \\
	1 6.1232e-17 \\
	2 -1 \\
	3 -1.837e-16 \\
	4 1 \\
	5 3.0616e-16 \\
	6 -1 \\
	7 -4.2863e-16 \\
	8 1 \\
	9 5.5109e-16 \\
	10 -1 \\
	11 -2.4499e-15 \\
	12 1 \\
	13 -9.8034e-16 \\
	14 -1 \\
	15 -2.6948e-15 \\
	16 1 \\
	17 -7.3541e-16 \\
	18 -1 \\
	19 -2.9398e-15 \\
	20 1 \\
};

\end{axis}
\end{tikzpicture}