fixPre1.8 {methods} | R Documentation |
Beginning with R version 1.8.0, the class of an object contains the
identification of the package in which the class is defined. The
function fixPre1.8
fixes and re-assigns objects missing that information
(typically because they were loaded from a file saved with a previous
version of R.)
fixPre1.8(names, where)
names |
Character vector of the names of all the objects to be fixed and re-assigned. |
where |
The environment from which to look for the objects, and
for class definitions. Defaults to the top environment of the
call to fixPre1.8 , the global environment if the function
is used interactively. |
The named object will be saved where it was found. Its class attribute will be changed to the full form required by R 1.8; otherwise, the contents of the object should be unchanged.
Objects will be fixed and re-assigned only if all the following conditions hold:
If any condition except the second fails, a warning message is generated.
Note that fixPre1.8
currently fixes only the change in
class attributes. In particular, it will not fix binary versions of
packages installed with earlier versions of R if these use
incompatible features. Such packages must be re-installed from
source, which is the wise approach always when major version changes
occur in R.
The names of all the objects that were in fact re-assigned.