On Sunday, April 1, 2012 3:56:41 AM UTC-4, P Purkayastha wrote:
>
> If I plot 2 points using list_plot3d, then they are correctly joined by a 
> line. If I increase the number of points to 3, then I don't get a plane and 
> instead get a bizarre shape with a "floor" suddenly appearing out of 
> nowhere. See the output of
>
> list_plot3d([(0,0,1), (1,2,2), (0,1,0)], interpolation='nn', 
> num_points=200, point_list=True)
>
>
    if isinstance(v, list):
        if len(v) == 0:
            # return empty 3d graphic
            from base import Graphics3d
            return Graphics3d()
        elif len(v) == 1:
            # return a point
            from shapes2 import point3d
            return point3d(v[0], **kwds)
        elif len(v) == 2:
            # return a line
            from shapes2 import line3d
            return line3d(v, **kwds)

But then it returns a list_plot3d_tuples and apparently this function is 
extended by zero outside of its surface.  I guess that makes sense.  Maybe 
we should also special-case len(v)==3 to make a plane?  I don't use this, 
so I don't know whether that would be good or bad to change for the 
"typical" use case.

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