If I create a logical column in my data.table and try to assign-by-reference a character value to it, the assignment fails silently. That is, it doesn't work but doesn't throw an error:
## make a simple data.table require(data.table) dt <- data.table(a=1:3, b=4:6, c=NA) ## fails silently dt[, c := "foo"] dt In other cases where an action would lead to the implicit conversion of a column, data.table throws an error suggesting that the user convert the column explicitly if that's what they really mean to do. I think that's the right behavior and should be adopted in this case as well. -John
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