data.table method

[medewitt]

I've run into an issue where I have to convert data.table objects to data.frames in order for the rules to be applied.

library(data.table)
library(magrittr)
library(dcmodify)

dt_women <- as.data.table(women)

m <- modifier( if (height < mean(height)) height <- 2*height
, if ( weight > mean(weight) ) weight <- weight/2  )
dt_out <- modify(dt_women,m)
df_out <- modify(women,m)

sum(delta_out <- dt_out$weight - df_out$weight)

Output:

527

It looks like the methods aren't picking up the second class of the data.table objects

[markvanderloo]

Yes, this is a property of S4 dispatch, so the only way to do it right now is indeed to convert explicitly.