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Define input-output relation by a look-up table

Question asked by elif on Jan 10, 2013
I have a set of recorded data for the input-output relation of a device. I want to model this device as a controlled source, output of which is dynamically determined through interpolation from the recorded data table, in transient analysis. 

I know how to interpolate data in frequency domain using 'freq' parameter and accessdata() command. However my controlling parameter is not frequency, it is the voltage of a node which dynamically changes in time. Is there a way to define input-output relation of a device by a lookup table.
Thanks in advance..