accessors: Extraction and Replacement

In plumbr: Mutable and Dynamic Data Models

Extraction and Replacement

Description

These functions extract, subset and replace data in a mutaframe. For the most part, these behave much like those for data.frame.

Arguments

x	A mutaframe
name	Name of the column to extract
i	The row indices
j	The column indices
...	Arguments passed to methods
value	The replacement column
drop	If TRUE and the result of subsetting is a single column or row, that column or row is extracted as the result. By default, this is TRUE if the result has one column.

Details

The subset function, [, does not copy the data; it establishes a dynamic filter.

Replacing an existing variable will pass the replacement data up the reverse pipeline, towards the root. When defining a new variable, the variable is stored in the current mutaframe; not at the root.

Value

The selected column

The selected column

A dynamic, filtering mutaframe

plumbr documentation built on May 7, 2022, 1:05 a.m.