How can I determine if a function generates a graph

Posted by Colin Gillespie on Stack Overflow See other posts from Stack Overflow or by Colin Gillespie
Published on 2010-04-30T09:15:37Z Indexed on 2010/04/30 9:17 UTC
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f = function(x,y){plot(x,y)}
g = function(x,y){mean(x*y)}

createFigure(f(x,y))#Returns TRUE
createFigure(g(x,y))#Returns FALSE

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