This function extracts the number of observations in an object
of class pim.environment, or the number of observations
for which a pim.poset is constructed. If applied to
a matrix or data.frame, it returns the number of rows.
For any other object it
does the same as length.
# S4 method for pim.environment
nobs(object)# S4 method for pim.poset
nobs(object)
# S4 method for matrix
nobs(object)
# S4 method for data.frame
nobs(object)
an object of the class pim.environment or pim.poset
In case the function is called on a pim.environment
or a pim.poset object,
an integer with the number of (foreseen) observations. If the
pim.environment is empty, it returns 0.
In all other cases, it returns the output of either nrow (for
matrices and data.frames)
or length.
This package imports the generic nobs from the package
stats4.