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This has a random number plus a timestamp
mp_cid(seed = NULL)
A string suitable as an Id with a random number plus a timestamp delimited by a period.
If you set a seed, then the random number will be the same for each value
Other Measurement Protocol functions: mp_event_item(), mp_event(), mp_send()
mp_event_item()
mp_event()
mp_send()
# random Id mp_cid() # fix the random number (but not the timestamp) mp_cid(1)
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