datatable.FExpr.remove()¶
Remove columns arg
from the current FExpr.
Each FExpr
represents a collection of columns, or a columnset. Some
of those columns are computed while others are specified “by reference”,
for example f.A
, f[:3]
or f[int]
. This method allows you to
remove by-reference columns from an existing FExpr.
Parameters¶
arg
FExpr
The columns to remove. These must be “columns-by-reference”, i.e. they cannot be computed columns.
return
FExpr
New FExpr which is a obtained from the current FExpr by removing
the columns in arg
.
See also¶
extend()
– append a columnset.
The content on this page is licensed under the Creative Commons Attribution 4.0 License
(CC BY 4.0) ,
and code samples are licensed under the MIT License.