vastorbit.VastColumn.add_copy¶

VastColumn.add_copy(name: str) → VastFrame¶

Adds a copy VastColumn to the parent VastFrame.

Parameters:: name (str) – Name of the copy.
Returns:: self._parent
Return type:: VastFrame

Examples

import vastorbit as vo

Hint

By assigning an alias to vastorbit, we mitigate the risk of code collisions with other libraries. This precaution is necessary because vastorbit uses commonly known function names like “average” and “median”, which can potentially lead to naming conflicts. The use of an alias ensures that the functions from vastorbit are used as intended without interfering with functions from other libraries.

Let us create a dummy dataset and copy one of its columns:

vdf = vo.VastFrame(
    {
        "val" : [0, 10, 20],
        "cat": ['a', 'b', 'c'],
    },
)

	123 val Integer	Abc cat Varchar(1)
1	10	b
2	20	c
3	0	a

Rows: 1-3 | Columns: 2

We can copy the “val” column, and name the new column:

vdf["val"].add_copy("val_copy")

	123 val Integer	Abc cat Varchar(1)	123 val_copy Integer
1	10	b	10
2	0	a	0
3	20	c	20

Rows: 1-3 | Columns: 3