Counts how many events occurred before the specified times in a
block-format data set.
A vector of times at which to determine the number of past events, in
A vector of times at which events occur, in
This function operates on data sets in
The times at which “events” occur is specified. For a given
vecotr of times, this function counts how many events occurred
prior to each of those times.
For instance, one may wish to compute how many episodes of a given disease occurred prior to baseline time (t=0) for each individual.
An integer vector in
block-format with respect to
id. The value indicates how events occurred prior to the
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