Note that there is a 'line.jpg' on the lower left corner in the picture, which is a part of the picture's name on my computer. I tried many ways to get rid of it, but failed. The code I use is
Code: Select all
\begin{figure}[htbp]
\centering
\includegraphics[width=0.70\textwidth]{perturbing line.jpg}
\caption{Perturbing line}
\label{fig:perturbing_line}
\end{figure}
[width=1.00\textwidth]
,but I don't need such a huge picture.