\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=-0.05,
ymax=0.30,
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 0.25 \\
	1 0.25 \\
	2 0 \\
	3 -4.5924e-17 \\
	4 0 \\
	5 2.1029e-17 \\
	6 0 \\
	7 -5.1645e-17 \\
	8 0 \\
	9 2.675e-17 \\
	10 0 \\
	11 -5.0146e-16 \\
	12 -4.996e-16 \\
	13 -8.5571e-16 \\
	14 -8.6042e-16 \\
	15 -9.2351e-16 \\
	16 -8.8818e-16 \\
	17 -8.4999e-16 \\
	18 -8.6042e-16 \\
	19 -9.2923e-16 \\
	20 -8.8818e-16 \\
};

\end{axis}
\end{tikzpicture}