documentclass[a4paper,12pt,onecolumn]{report}
usepackage{graphicx}
usepackage{wrapfig}

begin{document}

begin{wrapfigure}[9]{l}{0.25textwidth}
    includegraphics[width=0.25textwidth]{figs/Poly}
    caption{Wrapfigure used to put this figure        here!!}label{fig:right_fig}
end{wrapfigure}
Finally, lets try multi-figure commands and see how it works. An example is shown in Fig.~ref{fig:Multifigure} where we have a $2times2$ image which  is inserted by the following code.
begin{verbatim}
begin{figure}
begin{subfigure}{.5textwidth}
  centering
   includegraphics[width=.9linewidth]{figs/Poly}
   caption{} label{fig:Multifigure1}
end{verbatim}

To plot data -- either save in a .txt file or some numbers -- using LaTeX, the "pgfplots" package should be added at the preamble. To import data from a .txt file, the "tikz" package should be added, too. The following is an example...
end{document}

documentclass[a4paper,12pt,onecolumn]{report}
usepackage{graphicx}
usepackage{wrapfig}

begin{document}

begin{wrapfigure}[5]{l}{0.25textwidth}
    includegraphics[width=0.25textwidth]{Poly}
    caption{Wrapfigure used to put this figure        here!!}label{fig:right_fig}
end{wrapfigure}

Finally, lets try multi-figure commands and see how it works. An example is shown in Fig.~ref{fig:Multifigure} where we have a $2times2$ image which  is inserted by the following code.

hskip -7mm
begin{minipage}{0.65textwidth}
begin{verbatim}
begin{figure}
begin{subfigure}{.5textwidth}
  centering
   includegraphics[width=.9linewidth]{figs/Poly}
   caption{} label{fig:Multifigure1}
end{verbatim}
end{minipage}

To plot data -- either save in a .txt file or some numbers -- using LaTeX, the "pgfplots" package should be added at the preamble. To import data from a .txt file, the "tikz" package should be added, too. The following is an example...
end{document}

documentclass[a4paper,12pt,onecolumn]{report}
usepackage{graphicx}
usepackage{wrapfig}
usepackage{showframe}
usepackage{fancyvrb}

begin{document}

begin{wrapfigure}[9]{l}{0.25textwidth}
    includegraphics[width=0.25textwidth]{example-image}
    caption{Wrapfigure used to put this figure        here!!}label{fig:right_fig}
end{wrapfigure}
Finally, lets try multi-figure commands and see how it works. An example is shown in Fig.~ref{fig:Multifigure} where we have a $2times2$ image which  is inserted by the following code.
begin{Verbatim}
begin{figure}
begin{subfigure}{.5textwidth}
  centering
   includegraphics[width=.9linewidth]{figs/Poly}
   caption{} label{fig:Multifigure1}
end{Verbatim}

To plot data -- either save in a .txt file or some numbers -- using LaTeX, the "pgfplots" package should be added at the preamble. To import data from a .txt file, the "tikz" package should be added, too. The following is an example...
end{document}