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plumbr (version 0.6.3)

$.mutaframe: 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.

Value

  • The selected column

    The selected column

    A dynamic, filtering mutaframe

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.