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Reports whether x is a 'fourfactors' object
is.fourfactors(x)
an object to test.
Returns TRUE if its argument is of class fourfactors and FALSE otherwise.
fourfactors
P. Zuccolotto and M. Manisera (2020) Basketball Data Science: With Applications in R. CRC Press.
# NOT RUN { selTeams <- c(2,6,10,11) out <- fourfactors(Tbox[selTeams,], Obox[selTeams,]) is.fourfactors(out) # }
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