dcast.data.table
melt.data.table
and dcast.data.table
.DF.to.longDT(df_wide)
data.frame
in wide formatdata.table
object in long formatAll covariates that appear fewer than range(t) times are imputed with NA for missing time-points.
Observations with all NA's for all time-varying covariates are removed.
When removing NA's the time-varying covariates that are attributes (attnames) are not considered.
DF.to.long
;
doLTCF