bdp4R: Big Data Preprocessing For R

Description Usage Arguments Format Details Inherit Methods Private fields See Also

This class allows you to preprocess the data of an instance to find the contractions that are in it. Optionally, you can decide whether to replace the data contractions or not.

ContractionsPipe$new(propertyName = "contractions",
                     propertyLanguageName = "language",
                     alwaysBeforeDeps = list("GuessLanguagePipe"),
                     notAfterDeps = list())

`propertyName`	(character) Name of the property associated with the pipe.
`propertyLanguageName`	(character) Name of the language property.
`alwaysBeforeDeps`	(list) The dependences alwaysBefore (pipes that must be executed before this one).
`notAfterDeps`	(list) The dependences notAfter (pipes that cannot be executed after this one).

An object of class R6ClassGenerator of length 24.

This class needs files in json format that will contain the contractions to be located and the string that will replace them. For this it is necessary that the instance contains a property that indicates the language of the data to be able to correctly choose the list of contractions that apply to the data. The format of the file names of the resources has to be: contr.xxx.json (Being xxx the value of the language property of the instance).

To indicate the path where the associated resources are located, the configuration file is used. It is necessary to indicate in the section called resourcesPath, the path of resourcesContractionsPath.

The pipe will invalidate the instance in the moment that the resulting data is empty.

This class inherits from PipeGeneric and implements the pipe abstract function.

pipe Function that preprocesses the instance to obtain/replace the contractions. The contractions found in the pipe are added to the list of properties of the Instance. If the replaceContractions parameter is TRUE, the instance data will be modified by replacing the contractions found.
- Usage
  
  pipe(instance, replaceContractions = TRUE)
- Value
  
  The instance with the modifications that have occurred in the pipe.
- Arguments
  - instance (Instance) Instance to preproccess.
  - replaceContractions (logical) Indicates if the contractions are replace or not.
findContraction Function that checks if the contractions is in the data.
- Usage
  
  findContraction(data, contraction)
- Value
  
  TRUE or FALSE depending on whether the contraction is on the data.
- Arguments
  - data (character) Text in which the contraction is searched.
  - contraction (character) Indicates the contraction to find.
replaceContraction Function that replaces the contraction in the data for the extendedContraction.
- Usage
  
  replaceContraction(contraction, extendedContraction, data)
- Value
  
  The data with the contractions replaced.
- Arguments
  - contraction (character) Indicates the contraction to remove.
  - extendedContraction (character) Indicates the string to replace for the contraction found.
  - data (character) Text in which contractions will be replaced.
getPropertyLanguageName Getter of name of property language.
- Usage
  
  getPropertyLanguageName()
- Value
  
  Value of name of property language.
getResourcesContractionsPath Getter of path of contractions resources.
- Usage
  
  getResourcesContractionsPath()
- Value
  
  Value of path of contractions resources.