Add a regular plot to the x,y grid on a wireframe plot

Hello,
I would like to add the points from a regular plot() to the x and y axis of
a wireframe() plot, similar to the illustration below. 
Any ideas how to do this?
Thank you,
Jon F.
<http://r.789695.n4.nabble.com/file/n4660999/3d_wireframe_plus_2d_plot.png> 



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