apply_adapters_class: Apply the adapter-functions stored in an adapters class...

In a-maldet/readall: Read FWF, DSV, EXCEL And SAS Files

Description

Apply the adapter-functions stored in an adapters class object to a data.frame

Usage

apply_adapters_class(data, adapters)

Arguments

data	The data.frame, which should be modified
adapters	An adapters class object holding the adapter functions, which should be applied to the data.frame.

Value

The modified data.frame

adapters

An adapter function is a function that takes a data.frame as input argument and returns a modified version of this data.frame. The adapter functions are stored in an adapters class object, which is a special list that contains all adapter functions and a description text of each function. This class objects can be created by using the function new_adapters(). The adapters class objects can be added to a file_structure or a file_definition or a file_collection class object. After reading a data file (by calling read_data(file_definition)) all adapter functions listed in the adapters argument of the file_definition]new_file_definition() class object will be applied consecutively to the loaded data set. Adapter functions can be added to an existing file_structure or a file_definition or a file_collection class object by using the function add_adapters(). Adapter functions can be used for several tasks:

• adapt the data sets in such a way that they can be concatenated for mutliple years

• compute new variables from existing variables

• fix errors in variables

• transform the values of a variable of an older data set, such that it complies with a newer variable definition

a-maldet/readall documentation built on Dec. 18, 2021, 9:23 p.m.