gistfile1.txt

\begin{figure}[htbp]
\centering
\begin{tikzpicture}[x=0.1cm,y=0.1cm]
 
  \def\xmin{0}
  \def\xmax{1024000}
  \def\ymin{0}
  \def\ymax{200}
 
  % grid
  %\draw[style=help lines, ystep=1, xstep=1] (\xmin,\ymin) grid (\xmax,\ymax);
 
  % axes
  \draw[->] (\xmin,\ymin) -- (\xmax,\ymin) node[above] {$Games$};
  \draw[->] (\xmin,\ymin) -- (\xmin,\ymax) node[above] {$Perfects$};
 
  % xticks and yticks
  \foreach \x in {1000,2000,4000,8000,...,1024000}
    \node at (\x, \ymin) [below] {\x};
  \foreach \y in {0,20,...,200}
    \node at (\xmin,\y) [left] {\y};
 
  % plot the data from the file data.dat
  % smooth the curve and mark the data point with a dot
  \draw[color=blue] plot[mark=*,mark size=2pt] file {appendix/results/2-grade-olin0275-perfects.dat}
   node [above] {Actual};
 
\end{tikzpicture}
\caption{A player from 2nd grade experiencing adapting difficulty}
\label{fig:log_diff1}
\end{figure}