v2 added a length parameter to return the length of an array
Updated:
import_signal(index, harmonic, length) access point for pre-processed data imported here by copy paste
Parameters:
index: is the current data index, use 0 to initialize
harmonic: is the data set to index, use 0 to initialize
length: when true returns the length of the indicated harmonic array rather than the data
Returns: the data from the indicated harmonic array starting at index, and the starting timestamp of that data