How can i add formula to waveform data type?

I want to interpolate my acquired data in terms of voltage to temperature. For this i need to use polynomial equation, but i am not able to directly attach formula node to the waveform data type. I want to know how can i add formula node to waveform data, and then also have it real time.

One additional thought that may be helpful. Once you get the Y component of the waveform graph you are going to attempt to wire this into a formula node. You can do one of two things with that array. Put a for loop around the formula node and index the array into and out of the for loop. This allows you to do scalar math on the data. It is also possible to index and array in a formula node. The following KnoledgeBase demonstrates how to do this: http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/9d72b6069346942386256a0d00604ed4?OpenDocument

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