If I understand you correctly, this is a four-dimensional data set, which is not easy to graph in a three-dimensional world 🙂
In such cases, you might want to consider using a regular xy graph, showing power as a function of one coordinate (you might want to use a ring to choose between x, y, and z). Then one would consider adding two numeric controls to modify the other two coordinates; hence you would get a cut view out of your complete data set, say P(x,y=const, z=const), and with these three controls you can choose some possible planes (of course, you could add angles, too).
Another possibility could be to use a dedicated software, suitable for multidimensional data, e.g.. VisIt (https://wci.llnl.gov/codes/visit/home.html) that might even provide some programmer's interface.
The third possibility could be to use a 3D control, and change the color of individual data points according to your power value. Although this is 4-dimensional, it is not very accurate in the forth dimension (few colors only that can be safely distinguished). Moreover, for every single data point you will need a new plot because you can not set color for individual points (to my knowledge: could be a product suggestion for NI...)
Thus, first of all, you will need to decide what the most typical / relevant plot would be
