datatable.FExpr.extend()¶
Append FExpr
arg
to the current FExpr.
Each FExpr
represents a collection of columns, or a columnset. This
method takes two such columnsets and combines them into a single one,
similar to cbind()
.
Parameters¶
arg
FExpr
The expression to append.
return
FExpr
New FExpr which is a combination of the current FExpr and arg
.
See also¶
remove()
– remove columns from a columnset.
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