The quitte class is a more standardized data.frame format. is.quitte
tests if x is an quitte-object, as.quitte transforms x
to an quitte-object (if possible).
Arguments
- x
An object that should be either tested or transformed as/to an quitte-object.
- periodClass
integer or POSIXct
- addNA
modifies a factor by turning NA into an extra level (so that NA values are counted in tables, for instance).
- na.rm
if set to TRUE entries with value NA will be removed
- warn
display warnings or not