R - readRDS() & load() fail to give identical data.tables as the original

Question

Background

I tried to replace some CSV output files with rds files to improve efficiency. These are intermediate files that wi

Answer 1

The solution is to use setDT after load or readRDS

aDT2 <- readRDS("aDT2.RData")
setDT(aDT2)

source: Adding new columns to a data.table by-reference within a function not always working