LaTeX.org

Hello. I am putting two figures using the code below
\begin{figure}[h]
\centering
\includegraphics[width=150mm]{t1&t4}
\vspace*{-0.8 in} \caption {Comparison of the Profit Function between Case B and Case C.3}
\end{figure}

I want to write some comments between them but in the pdf file my ...

Hello. Thank you for the reply. Now, I import my graph to latex. However, I have another problem. The figure comes separate the paragraph and located between sentences. It is weird because the code for the figure is located under that paragraph.
I tried to resize the figure but it doesn't work.

Hello, I have a bunch a graph in Matlab and I am trying to import them to Latex.
I tried to save the graph as png and pdf files.
I use the code below:
\begin{figure}
\centering
\includegraphics{f1.1}
\caption{graph1}
\end{figure}

Latex gives me this error: LaTeX Error: Unknown graphics ...