when exporting latex how to set with in the includegraphics command

[Uwe Brauer]

Hi

The org syntaxes
#+ATTR_LaTeX: :float nil
#+CAPTION: El método del Trapecio  punto fijo vs PC
[[./diagram-trapfix-vs-trapfixpc-norigid.png]]

Gets translated to 

\begin{center}
\includegraphics[width=.9\linewidth]{./diagram-trapnwt-vs-trapnwtpc-norigid.png}
\captionof{figure}{\label{Eulimpfix}El método del Trapecio Nwt vs Trapecio 
Nwt-PC}
\end{center}

But I would like a smaller width say 0.5, how can I achieve that?

Thanks 

Uwe Brauer 

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