% This file was created by matlab2tikz v0.4.0.
% Copyright (c) 2008--2013, Nico Schlömer <nico.schloemer@gmail.com>
% All rights reserved.
% 
% The latest updates can be retrieved from
%   http://www.mathworks.com/matlabcentral/fileexchange/22022-matlab2tikz
% where you can also make suggestions and rate matlab2tikz.
% 
% 
% 

% defining custom colors
\definecolor{mycolor1}{rgb}{0.19047619047619,0.19047619047619,0.19047619047619}%
\definecolor{mycolor2}{rgb}{0.396825396825397,0.396825396825397,0.396825396825397}%
\definecolor{mycolor3}{rgb}{0.603174603174603,0.603174603174603,0.603174603174603}%
\definecolor{mycolor4}{rgb}{0.80952380952381,0.80952380952381,0.80952380952381}%

\begin{tikzpicture}

\begin{axis}[%
width=\figurewidth,
height=\figureheight,
area legend,
scale only axis,
xmin=0,
xmax=5,
xtick={1, 2, 3, 4},
xlabel={$\alpha$},
xmajorgrids,
ymin=0,
ymax=700,
ylabel={GFlops},
ymajorgrids,
legend style={at={(0.03,0.97)},anchor=north west,draw=black,fill=white,legend cell align=left}
]
\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=-0.0666666666666667\figurewidth,fill=black,draw=black] plot coordinates{(1,25.7269262023185)
(2,34.5244303964177)
(3,38.9976495252132)
(4,42.0688704662039)};

\addlegendentry{\tiny{1 GPU}};

\addplot [
color=black,
solid,
line width=1.0pt,
forget plot
]
table[row sep=crcr]{
0 0\\
5 0\\
};
\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=-0.04\figurewidth,fill=mycolor1,draw=black] plot coordinates{(1,45.7660023184681)
(2,61.0707130321338)
(3,71.6147118282191)
(4,76.4971402283698)};

\addlegendentry{\tiny{2 GPUs}};

\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=-0.0133333333333333\figurewidth,fill=mycolor2,draw=black] plot coordinates{(1,81.6048014543824)
(2,110.999576570219)
(3,129.333950678194)
(4,141.772486940809)};

\addlegendentry{\tiny{4 GPUs}};

\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=0.0133333333333333\figurewidth,fill=mycolor3,draw=black] plot coordinates{(1,133.626947231058)
(2,183.23775202709)
(3,216.230044922718)
(4,243.078097897826)};

\addlegendentry{\tiny{8 GPUs}};

\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=0.04\figurewidth,fill=mycolor4,draw=black] plot coordinates{(1,214.808744960503)
(2,305.941179521759)
(3,374.17892748913)
(4,412.649357383607)};

\addlegendentry{\tiny{16 GPUs}};

\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=0.0666666666666667\figurewidth,fill=white,draw=black] plot coordinates{(1,320.65759859086)
(2,484.833340183305)
(3,603.099139914345)
(4,649.931163224828)};

\addlegendentry{\tiny{32 GPUs}};

\end{axis}
\end{tikzpicture}%