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newconnect
2011 Apr 30
3
using tapply with multiple variables
HI All,
I have a long data file generated from a minimal pair test that I gave to
learners of Arabic before and after a phonetic training regime. For each of
thirty some subjects there are 800 rows of data, from each of 400 items at
pre and posttest. For each item the subject got correct, there is a 'C' in
the column 'Correct'. The line:
tapply(ALLDATA$Correct,