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# Copyright 2016-2019 Meik Michalke <meik.michalke@hhu.de>
#
# This file is part of the R package koRpus.
#
# koRpus is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# koRpus is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with koRpus. If not, see <http://www.gnu.org/licenses/>.
#' @export
#' @docType methods
#' @aliases show,kRp.text-method
#' @rdname show-methods
#' @include 02_method_show.kRp.lang.R
#' @include koRpus-internal.R
setMethod("show", signature(object="kRp.text"), function(object){
txt <- taggedText(object)
# only print head an tail of long texts
headLength <- formals(head.matrix)[["n"]]
if(isTRUE(nrow(txt) > (headLength * 2 + 1))){
# we need to extend the levels of the factors so they don't show ugly <NA>s
factor_cols <- sapply(txt, is.factor)
for (thisFactor in names(factor_cols)[factor_cols]){
# the dots are actually just needed for "wclass", but we'll keep it simple here...
levels(txt[[thisFactor]]) <- c(levels(txt[[thisFactor]]), "", "[...]")
}
# the tokens slot can change its columns, this must be dealt with dynamically
middle <- txt[1,]
for (thisCol in seq_along(middle)){
# haha, checking for middle class :-D
middle.class <- class(middle[thisCol])
middle[1,thisCol] <- switch(middle.class,
numeric=0,
logical=NA,
""
)
}
middle[[round(length(factor_cols) / 2)]] <- "[...]"
rownames(middle) <- ""
show.mtx <- rbind(head(txt), middle, tail(txt))
show(show.mtx)
} else {
show(txt)
}
features <- slot(object, "features")
features <- features[features]
if(length(features) > 0){
message(paste0("\nAdditional features:\n \"", paste0(names(features), collapse="\", \""), "\""))
} else {}
# add some stats if text was transformed
if(hasFeature(object, "diff")){
diff <- diffText(object)
message(paste0(
"\nDifference between original and transformed text (punctuation ignored)\n",
" Words: ", round(diff[["words"]], digits=2),"%\n",
" Letters: ", round(diff[["letters"]], digits=2),"%\n",
" Transformations: \"", paste0(diff[["transfmt"]], collapse="\", \""), "\""
))
} else {}
})
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