[R] blackboost (mboost package) function leads to non-reclaimable memory usage

Dear all, I am puzzled by R's memory usage when calling the blackboost function from package mboost to estimate a Gradient boosting model on a simulated dataset with 20 correlated variables and 100,000 obs. The blackboost object created by the function is only 15.3Mb, but R's memory usage increase

[R] Package missForest changes data types?

Hi, I'm trying to impute a data set consisting of mixed type variables, mostly logical, but also ordered and non-ordered factors, and numeric variables with the missForest package. Although the help file of missForest states that the resulting data matrix 'ximp' has the same type as the original d