[datatable-help] data.table BUG : data.table assignment

[natus]

Hello,

see this example :

require(data.table)

table1<-data.table(id=c(1,2,3),x=c(1,2,3))
table2<-table1
table1[,y:=sum(x)]
table1
table2

The problem ? Both of table1 and table2 have the variable 'y' BUT only
table1 should.

Thx



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