Converts missing values (NAs) to or from a user specified value. From smwrBase package.
na2miss(x, to =-99999)miss2na(x, from =-99999)
Arguments
x: a vector. Missing values (NAs) are allowed.
to: the replacement value for NA.
from: the target value to match and replace with NA.
Returns
An object like x with each target value replaced by the specified value.
Note
The function na2miss converts missing values (NA) to the value to and is useful to prepare a vector for export and subsequent use by software external to R that does not handle NAs.
The function miss2na converts the value from to NA and can be used to recode data imported from external software that uses a special value to indicate missing values.