This kind of question is already on Stackoverflow but it did not seem to solve my 'specific' problem.
I am imputing missing values into a dataset with the imputation package missForest. The output is a list with two elements and one of them is ximp which stores the imputed dataset. This dataset I want to save as a .Rdata file. However, R keeps giving me an error that it cannot find ximp. My code is as follows: 
save(random_forest2.1$ximp, file = "random_forest21.Rdata")
The random_forest2.1 (Large missForest(2 elements, 8.7 mb)) is the object that stores and processes the imputation model. 
How do I alter the save() function, so one element from that object can be saved? 
