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How to draw the graph of f(x,y) = x * y ?

Ben Bolker 
Paul Smith <phhs80 <at> gmail.com> writes:
There is a curve3d function in the emdbook package on CRAN.

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Paul Smith How to draw the graph of f(x,y) = x * y ? Sep 23 Duncan Murdoch How to draw the graph of f(x,y) = x * y ? Sep 23 Paul Smith How to draw the graph of f(x,y) = x * y ? Sep 23 Ben Bolker How to draw the graph of f(x,y) = x * y ? Sep 23 robin hankin How to draw the graph of f(x,y) = x * y ? Sep 23 Paul Smith How to draw the graph of f(x,y) = x * y ? Sep 24 Farley, Robert How to draw the graph of f(x,y) = x * y ? Sep 24 Paul Smith How to draw the graph of f(x,y) = x * y ? Sep 24