[R] Mathematical working procedure of imputation methods (medianImpute, knnImpute, and bagImpute) in caret package R

[K Purna Prakash]

Dear Sir/Madam,
Greetings!!!

Kindly provide the detailed internal mathematical working mechanism of the
following median, KNN, and bagging imputation methods available in caret
package R.

 preProcess(train_data, method = "medianImpute")
 preProcess(train_data, method = "knnnImpute")
 preProcess(train_data method = "bagImpute")

The details provided by you will help me a lot for a better understanding
of these imputation methods especially while dealing with large sets of
data.

I will look forward to hearing from you.

Thanks and regards,
K. Purna Prakash.

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