Export graphics to PDF.
xs2pdf(win_num, file_name [,orientation])
xs2pdf(fig, file_name [,orientation])
:win_num integer, id of the figure to export. : :fig handle of the figure to export. : :file_name string, name of the exported file. If the extension is
not provided, it is going to be automatically added.
:
xs2pdf exports the display of a graphic window into an PDF file.
`scf`_(0);
`plot2d`_();
//PDF export
filename='foo';
xs2pdf(0,filename);
xs2pdf(`gcf`_(),filename);