character value specifying the data type of the clear value. If it is not
"character" and
by.default=T, it will be overridden by the default data type
of
default.object.
default.object
dataset which may be referenced in determining the data type of the clear value.
If
clear.type is not
"character" and
by.default=T, the data type of the
clear value will be the default data type of
default.object. If it is
NULL
(the default), its default data type is
"logical"; if it is an object which
inherits from class
"data.frame", its default data type is
"numeric";
otherwise, its default data type is
data.class(default.object), or if that is
"numeric" then
storage.mode(default.object).
by.default
logical flag: if
TRUE and
clear.type is not
"character",
default.object
will be used instead of
clear.type to determine the data type of the clear
value.
VALUE:
Either
"" if the data type of the clear value is
"character", or
NA
coerced to the data type.