\documentclass{article}
\usepackage{tikz}
\usepackage{pgfplotstable}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
\begin{axis}[
 title = Heterogeneity between nodes at 23W , 
 xlabel=  Core Ids,
 ylabel= Total Execution Time (secs),
 ymax=34, ymin=2, xmax=60, xmin=0,
 x tick label style={black},
 grid=both
 ]
\addplot table [x=PE, y= PLB]{data1.dat};
\addlegendentry {With Power Aware LB}
\addplot table [x=PE, y= WOLB]{data1.dat};
\addlegendentry {Without LB}
\end{axis}
\end{tikzpicture}

 
\end{document}
%0 4.877367 2.008364 5.643303 2.833776
%1 17.578722 17.827791 14.226818 10.759991
