Displaying 1 result from an estimated 1 matches for "shadamerican".
2012 Oct 25
5
trying ti use a function in aggregate
Hi -I am using R v 2.13.0. I am trying to use the aggregate function to
calculate the percent at length for each Trip_id and CommonName. Here is a
small subset of the data.
Trip_id Vessel CommonName Length Count
1 230 Sunlight Shad,American 19 1
2 230 Sunlight Shad,American 20 1
3 230 Sunlight Shad,American 21