corpus: Toolkit for Corpus Analysis

#' @include generics.R 
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#' @importFrom graphics dotchart grid par plot points rect text
#' @importFrom stats formula ftable setNames xtabs
#' @importFrom utils View browseURL download.file setTxtProgressBar txtProgressBar untar write.csv
#' @importFrom tm TermDocumentMatrix DocumentTermMatrix
#' @importFrom tm as.TermDocumentMatrix as.DocumentTermMatrix
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#' @importFrom Matrix rowSums colSums
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#' polmineR-package
#' 
#' Machinery for mining CWB corpora
#'
#' The package provides functions for basic text statistics for corpora 
#' that are managed by the Corpus Workbench (CWB). A core feature is to generate
#' subcorpora/partitions based on metadata. The package is also meant to serve
#' as an interface between the CWB and R-packages implementing more
#' sophisticated statistical procedures (e.g. lsa, lda, topicmodels) or
#' providing further functionality for text mining (e.g. tm).
#'   
#' Any analysis using this package will usually start with setting up a 
#' subcorpus/partition (with \code{partition}). A set of partitions can be
#' generated with \code{partitionBundle}. Once a partition or a set of partitions
#' has been set up, core functions are \code{context} and
#' \code{compare}. Based on a partition bundle, a
#' term-document matrix (class 'TermDocumentMatrix' from the tm package) can be
#' generated (with \code{as.TermDocumentMatrix}). This opens the door to the wealth of
#' statistical methods implemented in R.
#' 
#' When the package is loaded and attached, the package will look for a file name 'polmineR.conf'
#' in a directory defined by the environment variable 'POLMINER_DIR'. It will take general 
#' settings for polmineR from that file. Second, templates are restored.
#' 
#' @author Andreas Blaette (andreas.blaette@@uni-due.de)
#' @references http://polmine.sowi.uni-due.de
#' @keywords package
#' @docType package
#' @rdname polmineR-package
#' @name polmineR-package
#' @examples
#' \dontrun{
#' # examples in the manual rely in a sample corpus that can be install as follows:
#' drat::addRepo("PolMine", alturl="https://polmine.github.io/drat/")
#' install.packages("polmineR.sampleCorpus")
#' }
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#' generic methods defined in the polmineR-package
#' 
#' The package defines a set of generic functions. This doc file
#' only provides an overview. Please consult the documentation
#' of the classes to learn which methods can be applied to a class
#' of a certain type.
#' 
#' @rdname polmineR-generics
#' @param x object
#' @param value value
#' @name polmineR-generics
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# setOldClass("dfmSparse") # class defined in quanteda-package
setOldClass("igraph")
setOldClass("html")