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animint
2007 Dec 10
0
problem using "by" with custom function?
...dises the data based on the X and Y values, then uses dpik
to calculate the bandwidth for each variable. The result is the average of
the X and Y estimates. I then use the command "by" to run the function on a
dataframe which has X and Y in columns 5 and 6, and a grouping variable
"animonth" to individualise the data by animal and month. when I run the by
command on a small data table (only a few different levels of animonth) it
works perfectly.
The problem is when I try to run it on all the data (or more than a few
levels) at once. I get the error posted below. However, if...