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measurecols
2006 Oct 19
2
Getting group size in a data frame
Hi all,
I have a data frame with some measured values of some animals. Sometimes the
measurement failed, resulting in a NA for a measurement and sometimes the
animal died, resulting in NA for all measurements.
I have several groups of animals. How do I find the size of each group with
only alive animals? And how do I find the size of the groups for each
measurement?
An example:
l1 <-