i need add 100 columns data.frame based on length of previous data.frame
for example, have 2 data.frames xtrain , xtest. xtrain 1000 columns, xtest has 900 columns. difference due 1-hot encoding xtrain , xtest separately.
how can add 100 missing columns (with 0s) xtest? also, order of columns in augmented xtest should same xtrain.
this have tried far:
extra = setdiff(names(xtrain), names(xtest)) (e in extra){ xtest$e <- 0 } but adds column e not corresponding entry in extra.
