javascript - How to create layount elements depending on data context in protovis-js? -


i @ beautiful sample , so , can't wonder how create lemements like:

bg.add(pv.wedge)           .angle(smallangle)           .startangle(function(d) this.proto.startangle() + smallangle)           .outerradius(function(d) radius(d.penicillin))           .fillstyle(drugcolor.penicillin)

only if d.penicillin > 0 call bg.add(pv.wedge) (so have more or less ui elements depending on data, not params)?


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