% This file was created by matlab2tikz v0.2.2.
% Copyright (c) 2008--2012, 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}[%
view={0}{90},
width=\figurewidth,
height=\figureheight,
scale only axis,
xmin=0, xmax=5,
xtick={1,2,3,4},
xlabel={$\alpha$},
xmajorgrids,
ymin=0, ymax=200,
ylabel={GFlops},
ymajorgrids,
%legend style={at={(0.03,0.97)},anchor=north west,nodes=right},
legend pos=outer north east,
area legend]
\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=-0.0666666666666667\figurewidth,fill=black,draw=black] plot coordinates{ (1,22.7580842315813) (2,31.7449314051055) (3,37.1798950457675) (4,40.253492018759) };

\addlegendentry{1 GPU};

\addplot [
color=black,
solid,
line width=1.0pt,
forget plot
]
coordinates{
 (0,0)(5,0) 
};
\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=-0.04\figurewidth,fill=mycolor1,draw=black] plot coordinates{ (1,32.3920897978954) (2,44.0505761891603) (3,51.8209797695948) (4,56.6033287946837) };

\addlegendentry{2 GPUs};

\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=-0.0133333333333333\figurewidth,fill=mycolor2,draw=black] plot coordinates{ (1,49.0164694619377) (2,66.4549239202078) (3,78.0336968020553) (4,85.0178374521632) };

\addlegendentry{4 GPUs};

\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=0.0133333333333333\figurewidth,fill=mycolor3,draw=black] plot coordinates{ (1,70.193327263964) (2,95.9835965533234) (3,111.091725833056) (4,121.135339367746) };

\addlegendentry{8 GPUs};

\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=0.04\figurewidth,fill=mycolor4,draw=black] plot coordinates{ (1,88.712013536379) (2,120.532134464085) (3,140.458981798998) (4,152.964872416231) };

\addlegendentry{16 GPUs};

\addplot[ybar,bar width=0.0213333333333333\figurewidth,bar shift=0.0666666666666667\figurewidth,fill=white,draw=black] plot coordinates{ (1,96.2830194223254) (2,137.618031008295) (3,159.909906528023) (4,174.668140378932) };

\addlegendentry{32 GPUs};

\end{axis}
\end{tikzpicture}%