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Annotation of /trunk/tm/ChangeLog

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1 : feinerer 770 2007-07-17 Ingo Feinerer <h0125130@wu-wien.ac.at>
2 :    
3 :     * R/termdocmatrix.R (TermDocMatrix): Improved efficiency. Kudos to
4 :     Christian Buchta.
5 :    
6 : feinerer 768 2007-07-15 Ingo Feinerer <h0125130@wu-wien.ac.at>
7 :    
8 :     * inst/doc/tm.Rnw: Update vignette (readPDF, readHTML, preprocessReut21578XML).
9 :    
10 : feinerer 766 2007-07-14 Ingo Feinerer <h0125130@wu-wien.ac.at>
11 :    
12 : feinerer 767 * R/reader.R (readHTML): Added very simple HTML reader to obtain StructuredTextDocuments.
13 :    
14 : feinerer 766 * R/reader.R (readPDF): Added PDF reader.
15 :    
16 : feinerer 765 2007-07-13 Ingo Feinerer <h0125130@wu-wien.ac.at>
17 :    
18 :     * DESCRIPTION: Moved proxy from Depends to Imports to avoid name clashes.
19 :    
20 :     * inst/stopwords/english.dat: Added the term "yes" to stopwords.
21 :    
22 :     * R/termdocmatrix.R (dim): dim function for TermDocMatrix.
23 :    
24 :     * R/preprocess.R (convertMboxEml): Accepts gzipped mboxes.
25 :    
26 : feinerer 763 2007-07-11 Ingo Feinerer <h0125130@wu-wien.ac.at>
27 :    
28 :     * R/distmeasure.R (dissimilarity): Replaced dists call from
29 :     package cba by new dist call from package proxy.
30 :    
31 : feinerer 761 2007-07-10 Ingo Feinerer <h0125130@wu-wien.ac.at>
32 :    
33 :     * inst/doc/tm.Rnw: Described removeSparseTerms and Dictionary.
34 :    
35 : feinerer 760 2007-06-21 Ingo Feinerer <h0125130@wu-wien.ac.at>
36 :    
37 :     * R/termdocmatrix.R: require() uses the quietly option to suppress
38 :     loading messages.
39 :    
40 : feinerer 758 2007-06-12 Ingo Feinerer <h0125130@wu-wien.ac.at>
41 :    
42 :     * R/dictionary.R: Added dictionary support.
43 :    
44 : feinerer 757 2007-06-07 Ingo Feinerer <h0125130@wu-wien.ac.at>
45 :    
46 :     * R/aobjects.R: Added classes for Reuters21578 XML and RCV1
47 :     documents. This simplifies some functions, e.g., asPlain.
48 :    
49 : feinerer 756 2007-06-06 Ingo Feinerer <h0125130@wu-wien.ac.at>
50 :    
51 :     * inst/doc/tm.Rnw: Fixed some typos in vignette.
52 :    
53 : feinerer 755 2007-06-03 Ingo Feinerer <h0125130@wu-wien.ac.at>
54 :    
55 :     * R/textdoccol.R (replaceWords): Added method to replace a set of
56 :     words by a single word. Useful for synonyms.
57 :    
58 : feinerer 754 2007-05-22 Ingo Feinerer <h0125130@wu-wien.ac.at>
59 :    
60 :     * man/TermDocMatrix.Rd: Fixed documentation on Data slot.
61 :    
62 : feinerer 752 2007-05-19 Ingo Feinerer <h0125130@wu-wien.ac.at>
63 :    
64 :     * R/termdocmatrix.R (textvector): Small fix for dealing with empty
65 :     vectors. Thanks to Ariel Maguyon for his error report.
66 :     (removeSparseTerms): New function to remove columns from a
67 :     term-document matrix exceeding a sparse factor.
68 :    
69 : feinerer 751 2007-05-15 Ingo Feinerer <h0125130@wu-wien.ac.at>
70 :    
71 :     * man/tmUpdate.Rd: Corrected documentation on readerControl parameter.
72 :    
73 : feinerer 750 2007-05-11 Ingo Feinerer <h0125130@wu-wien.ac.at>
74 :    
75 :     * man/sFilter.Rd: Corrected documentation on statement format (use
76 :     '==' instead of '=').
77 :    
78 : feinerer 749 2007-05-08 Ingo Feinerer <h0125130@wu-wien.ac.at>
79 :    
80 :     * R/aobjects.R (StructuredTextDocument): Inherits from
81 :     TextDocument.
82 :    
83 : feinerer 748 2007-05-04 Ingo Feinerer <h0125130@wu-wien.ac.at>
84 :    
85 :     * R/termdocmatrix.R (findFreqTerms): Perform efficient computation
86 :     on sparse matrices as proposed by Martin Maechler.
87 :    
88 : feinerer 747 2007-04-27 Ingo Feinerer <h0125130@wu-wien.ac.at>
89 :    
90 :     * R/textdoccol.R: Removed \code{dbDisconnect} calls since last
91 :     \pkg{filehash} version makes them deprecated.
92 :    
93 : feinerer 744 2007-04-22 Ingo Feinerer <h0125130@wu-wien.ac.at>
94 :    
95 :     * R/termdocmatrix.R (textvector): Stemming is now performed before
96 :     erasing stopwords.
97 :     (weightMatrix): Adapted to handle sparse matrices.
98 :     (TermDocMatrix): Sparse matrix is now efficiently built by
99 :     direct stepwise insertion of row values into it.
100 :    
101 : feinerer 741 2007-04-21 Ingo Feinerer <h0125130@wu-wien.ac.at>
102 :    
103 :     * DESCRIPTION: Replaced \pkg{filehashSQLite} with \pkg{filehash}
104 :     due to ongoing problems. For our purposes the latter is as useful
105 :     as the replaced package.
106 :    
107 : feinerer 738 2007-04-20 Ingo Feinerer <h0125130@wu-wien.ac.at>
108 :    
109 :     * man/TextDocCol.Rd: Replaced \code{readPlain} with \code{object@DefaultReader}.
110 :    
111 :     * man/TermDocMatrix.Rd: Remove deprecated \code{language} argument.
112 :    
113 : feinerer 737 2007-04-15 Ingo Feinerer <h0125130@wu-wien.ac.at>
114 :    
115 :     * R/resolve.R (resolveISOCode): Added ISO 639-1 codes for
116 :     languages with available stopwords.
117 :    
118 : feinerer 736 2007-04-14 Ingo Feinerer <h0125130@wu-wien.ac.at>
119 :    
120 :     * inst/doc/tm.Rnw: Minor corrections in the vignette.
121 :    
122 : feinerer 731 2007-04-11 Ingo Feinerer <h0125130@wu-wien.ac.at>
123 :    
124 : feinerer 732 * DESCRIPTION: Update to version 0.2, since a lot of new features
125 :     have been integrated.
126 : feinerer 731
127 : feinerer 732 * inst/stopwords: Updated existing stopwords and added stopwords
128 :     for various other languages.
129 :    
130 : feinerer 729 2007-04-10 Ingo Feinerer <h0125130@wu-wien.ac.at>
131 :    
132 : feinerer 730 * man/: Updated documentation.
133 :    
134 : feinerer 729 * Work/testDb.R: Script to test database stuff.
135 :    
136 :     * R/: Fixed various database related bugs. Seems to be rather
137 :     useable now, i.e., consider as alpha status for now.
138 :    
139 : feinerer 727 2007-04-08 Ingo Feinerer <h0125130@wu-wien.ac.at>
140 :    
141 :     * R/: Fixed some bugs related to database support.
142 :    
143 : feinerer 726 2007-04-07 Ingo Feinerer <h0125130@wu-wien.ac.at>
144 :    
145 :     * man/: Added a lot of examples to the manuals.
146 :    
147 : feinerer 725 2007-04-05 Ingo Feinerer <h0125130@wu-wien.ac.at>
148 :    
149 :     * man/: Updated parts of the documentation.
150 :    
151 :     * R/textdoccol.R (asPlain): Added conversion from newsgroup
152 :     documents to plain text documents.
153 :    
154 : feinerer 722 2007-04-01 Ingo Feinerer <h0125130@wu-wien.ac.at>
155 :    
156 : feinerer 724 * R/textdoccol.R: Finished experimental database support. Not yet
157 :     intensively tested.
158 :    
159 : feinerer 723 * R/source.R: Now each source has a default reader.
160 :    
161 : feinerer 722 * R/reader.R: \code{FunctionGenerator} is now an attribute, not a
162 :     class anymore.
163 :    
164 :     * R/plaintextdoc.R: Custom show method for plain text documents.
165 :    
166 :     * R/aobjects.R: Added a class for structured text documents.
167 :    
168 :     * R/reader.R: Replaced remaining \code{parser} occurrences with
169 :     \code{reader}.
170 :    
171 :     * R/textdoccol.R (summary): Indent tags.
172 :    
173 : feinerer 725 * R/textdoccol.R (removePunctuation): Transform method to remove
174 : feinerer 722 punctuation marks.
175 :    
176 : feinerer 721 2007-03-21 Ingo Feinerer <h0125130@wu-wien.ac.at>
177 :    
178 :     * R/textdoccol.R (sFilter): Simplified sFilter significantly by
179 :     using prescindMeta().
180 :    
181 : feinerer 719 2007-03-18 Ingo Feinerer <h0125130@wu-wien.ac.at>
182 :    
183 :     * R/textdoccol.R: Improved database support.
184 :    
185 : feinerer 717 2007-03-16 Ingo Feinerer <h0125130@wu-wien.ac.at>
186 :    
187 : feinerer 718 * R/termdocmatrix.R (TermDocMatrix): Uses sparse matrices.
188 :    
189 : feinerer 717 * R/resolve.R (resolveISOcode): Extracts the language from a ISO
190 :     language code.
191 :    
192 :     * R/textdoccol.R (TextDocCol): Refactored several parser arguments
193 :     into parserControl argument.
194 :    
195 :     * R/aobjects.R (TextDocument): Introduced the "Language" slot.
196 :    
197 : feinerer 713 2007-03-14 Ingo Feinerer <h0125130@wu-wien.ac.at>
198 :    
199 : feinerer 715 * Work/tmDataSetup.R: The datasets acq and crude can now be
200 :     created on the fly.
201 :    
202 : feinerer 713 * R/stopwords.R: Introduced a function returning the stopwords for
203 :     a given language (English, German and French at the moment)
204 :    
205 :     * R/textdoccol.R (stemDoc): Stemming uses Rstem if available,
206 :     otherwise falls back to Snowball package.
207 :    
208 : feinerer 711 2007-01-30 Ingo Feinerer <h0125130@wu-wien.ac.at>
209 :    
210 :     * man/dissimilarity-methods.Rd: Make clear that any method offered
211 :     by "dists" from package "cba" can be used.
212 :    
213 : feinerer 708 2007-01-22 Ingo Feinerer <h0125130@wu-wien.ac.at>
214 :    
215 : feinerer 710 * inst/doc/tm.Rnw: Fixed quotes-appearing-as-boxes-bug according
216 :     to Kurt's latex suggestion. Removed points and underscores in
217 :     variable names for consistent naming.
218 :    
219 : feinerer 708 * DESCRIPTION: Update to version 0.1-2.
220 :    
221 :     * man/TextRepository.Rd: Fixed bug in documentation.
222 :    
223 : feinerer 704 2007-01-12 Ingo Feinerer <h0125130@wu-wien.ac.at>
224 :    
225 :     * DESCRIPTION: Update to version 0.1-1.
226 :    
227 : feinerer 702 2007-01-09 Ingo Feinerer <h0125130@wu-wien.ac.at>
228 :    
229 :     * R/textdoccol.R (stemDoc): Use Rstem::wordStem instead of
230 :     wordStem.
231 :    
232 : feinerer 698 2007-01-06 Ingo Feinerer <h0125130@wu-wien.ac.at>
233 :    
234 :     * R/: Changes due to Kurt's review.
235 :    
236 : feinerer 694 2006-12-31 Ingo Feinerer <h0125130@wu-wien.ac.at>
237 :    
238 :     * R/: Implemented improvements based upon comments by David
239 :     Meyer.
240 :    
241 : feinerer 691 2006-12-17 Ingo Feinerer <h0125130@wu-wien.ac.at>
242 :    
243 :     * inst/doc/: Rewrote vignette.
244 :    
245 :     * man/: Improved documentation.
246 :    
247 : feinerer 690 2006-12-16 Ingo Feinerer <h0125130@wu-wien.ac.at>
248 :    
249 :     * man/: Updated documentation.
250 :    
251 :     * DESCRIPTION: Changed package name to "tm". Updated version to
252 :     0.1 for first CRAN release.
253 :    
254 :     * inst/texts/gmane.comp.lang.r.general.mbox: mbox Gmane R mailing
255 :     list archive example.
256 :    
257 :     * inst/texts/gmane.comp.lang.r.gr.rdf: RSS Gmane R mailing list
258 :     archive example.
259 :    
260 :     * R/preprocess.R (convert_mbox_eml): A simple e-mail converter
261 :     from (several mails per box) mbox format to (single mail per file)
262 :     eml format.
263 :    
264 : feinerer 689 2006-12-08 Ingo Feinerer <h0125130@wu-wien.ac.at>
265 :    
266 :     * data/crude.rda: Rebuilt.
267 :    
268 :     * data/acq.rda: Rebuilt.
269 :    
270 :     * R/reader.R: Factored out reader and parser methods from
271 :     textdoccol.R.
272 :    
273 :     * R/source.R: Factored out Source methods from aobjects.R and
274 :     textdoccol.R.
275 :     (GmaneRSource): Encapsulates Gmane R mailing list archive RSS
276 :     feeds.
277 :    
278 :     * R/textdoccol.R (DirSource): Added support for recursive
279 :     traversal of directories.
280 :    
281 :     2006-12-07 Ingo Feinerer <h0125130@wu-wien.ac.at>
282 :    
283 :     * R/textdoccol.R ([[): Loads the document corpus automatically
284 :     into memory upon access.
285 :     (tm_transform, tm_filter): Removed several checks whether the
286 :     document is already loaded ([[ ensures this now).
287 :     (gmane_r_reader): Reader for RSS feeds as provided by the Gmane R
288 :     mailing list archive.
289 :    
290 :     2006-12-06 Ingo Feinerer <h0125130@wu-wien.ac.at>
291 :    
292 :     * R/aobjects.R (TextDocument): Is now a virtual class.
293 :     (Source): Is now a virtual class.
294 :    
295 :     2006-12-05 Ingo Feinerer <h0125130@wu-wien.ac.at>
296 :    
297 :     * R/textdoccol.R (c): Support for an arbitrary number of document
298 :     collections.
299 :    
300 : feinerer 77 2006-11-26 Ingo Feinerer <h0125130@wu-wien.ac.at>
301 :    
302 :     * R/textrepo.R: Updated TextRepository (constructor), append_elem,
303 :     append_meta and remove_meta.
304 :    
305 :     * R/textdoccol.R: Removed modify_metadata method.
306 :    
307 :     * R/textrepo.R: Removed modify_metadata method.
308 :    
309 :     * R/textdoccol.R (remove_meta): Supports removal of document
310 :     collection metadata and document (= in data frame) metadata.
311 :    
312 : feinerer 76 2006-11-23 Ingo Feinerer <h0125130@wu-wien.ac.at>
313 :    
314 :     * R/textdoccol.R (append_doc): Bug fix for handling empty metadata.
315 :    
316 :     * data/crude.rda: Rebuilt.
317 :    
318 :     * data/acq.rda: Rebuilt.
319 :    
320 :     * inst/doc/textmin.Rnw: Updated vignette to reflect code changes.
321 :    
322 :     * R/textdoccol.R ([): Bug fix for subsetting a document
323 :     collection's data frame.
324 :    
325 : feinerer 75 2006-11-22 Ingo Feinerer <h0125130@wu-wien.ac.at>
326 :    
327 :     * R/textdoccol.R: Bug fixes in s_filter. Added full query support
328 :     to s_filter.
329 :    
330 :     * R/textdoccol.R: Local text documents' metadata can now be copied
331 :     to a document collection's data frame with prescind_meta.
332 :    
333 : feinerer 73 2006-11-21 Ingo Feinerer <h0125130@wu-wien.ac.at>
334 :    
335 : feinerer 74 * R/: Text documents' slot metadata is now accessible in s_filter.
336 :    
337 : feinerer 73 * R/: Rewrote s_filter function (has still some restrictions).
338 :    
339 : feinerer 72 2006-11-20 Ingo Feinerer <h0125130@wu-wien.ac.at>
340 :    
341 :     * R/: Various fixes in handling metadata.
342 :    
343 :     * R/: Added update mechanism for text document collections.
344 :    
345 : feinerer 71 2006-11-19 Ingo Feinerer <h0125130@wu-wien.ac.at>
346 :    
347 :     * R/: Merging of document collections now creates a binary tree
348 :     for reconstructing merged document collections.
349 :    
350 :     * R/: Redesign of metadata for document collections.
351 :    
352 : feinerer 70 2006-11-07 Ingo Feinerer <h0125130@wu-wien.ac.at>
353 :    
354 :     * R/: Messages now use \code{ngettext}.
355 :    
356 : feinerer 69 2006-11-03 Ingo Feinerer <h0125130@wu-wien.ac.at>
357 :    
358 :     * R/: Added functions for modifying and removing metadata.
359 :    
360 : feinerer 67 2006-11-01 Ingo Feinerer <h0125130@wu-wien.ac.at>
361 :    
362 :     * man/: Updated some documentation.
363 :    
364 :     * R/: Corrected some connection issues.
365 :    
366 :     * inst/doc: Worked on the vignette.
367 :    
368 : feinerer 65 2006-10-31 Ingo Feinerer <h0125130@wu-wien.ac.at>
369 :    
370 : feinerer 66 * inst/: Added texts and started vignette.
371 :    
372 : feinerer 65 * R/: Final changes based upon David's comments.
373 :    
374 : feinerer 64 2006-10-29 Ingo Feinerer <h0125130@wu-wien.ac.at>
375 :    
376 :     * NAMESPACE: Corrected exports (generic methods need exportMethods
377 :     directives!).
378 :    
379 : feinerer 63 2006-10-26 Ingo Feinerer <h0125130@wu-wien.ac.at>
380 :    
381 :     * R/: Modified the TextDocCol constructur and various parsers. It
382 :     is now modular and supports various file formats via plugins (see
383 :     the new "Source" class).
384 :    
385 : feinerer 62 2006-10-24 Ingo Feinerer <h0125130@wu-wien.ac.at>
386 :    
387 :     * man/: Revised documentation after previous code changes.
388 :    
389 : feinerer 61 2006-10-23 Ingo Feinerer <h0125130@wu-wien.ac.at>
390 :    
391 :     * R/: Remaining changes as discussed with David.
392 :    
393 : feinerer 60 2006-10-22 Ingo Feinerer <h0125130@wu-wien.ac.at>
394 :    
395 :     * R/: Some changes as suggested by David. The rest will follow
396 :     within the next days.
397 :    
398 : feinerer 59 2006-09-26 Ingo Feinerer <h0125130@wu-wien.ac.at>
399 :    
400 :     * man/: Finished documentation.
401 :    
402 : feinerer 58 2006-09-25 Ingo Feinerer <h0125130@wu-wien.ac.at>
403 :    
404 :     * man/: Wrote some documentation.
405 :    
406 : feinerer 56 2006-09-24 Ingo Feinerer <h0125130@wu-wien.ac.at>
407 :    
408 :     * R/: Further syntactic sugar in form of additional assignment and
409 :     accessor methods.
410 :    
411 : feinerer 54 2006-09-13 Ingo Feinerer <h0125130@wu-wien.ac.at>
412 :    
413 :     * R/: Syntactic sugar in form of "length", "show" and "summary"
414 : feinerer 56 operators.
415 : feinerer 54
416 : feinerer 53 2006-08-24 Ingo Feinerer <h0125130@wu-wien.ac.at>
417 :    
418 :     * R/: Diverse updates. Mainly on default operators ("[" or "c")
419 :     and dissimilarities.
420 :    
421 : feinerer 52 2006-08-12 Ingo Feinerer <h0125130@wu-wien.ac.at>
422 :    
423 :     * R/: Added similarity functions.
424 :    
425 :     * data/: Added english stopwords.
426 :    
427 : feinerer 50 2006-08-07 Ingo Feinerer <h0125130@wu-wien.ac.at>
428 :    
429 : feinerer 51 * data/: Examples compiled for new features
430 :    
431 :     * R/: Changes due to new structure.
432 :    
433 : feinerer 50 * NAMESPACE: Corrected namespace to reflect new structure.
434 :    
435 :     * R/termdocmatrix.R: Adapted for new naming scheme.
436 :    
437 : feinerer 49 2006-08-06 Ingo Feinerer <h0125130@wu-wien.ac.at>
438 :    
439 :     * R/textdoccol.R: Adapted code for new class structure. Wrote
440 :     several transform and filter functions operating on text document
441 :     collections (alias text document databases).
442 :    
443 :     * R/aobjects.R: Adapted class structure with inheritance,
444 :     repositories and additional meta data. Loading files on demand is
445 :     now possible.
446 :    
447 : feinerer 48 2006-07-13 Ingo Feinerer <h0125130@wu-wien.ac.at>
448 :    
449 :     * R/: Some cosmetic cleanups.
450 :    
451 :     * inst/: Removed vignette on clustering. That and much more is now
452 :     described in the JSS paper on text mining. Based upon that
453 :     article an elaborated vignette will be incorporated in the future.
454 :    
455 : feinerer 42 2006-07-01 Ingo Feinerer <h0125130@wu-wien.ac.at>
456 :    
457 :     * R/: Updated generic S4 methods to comply with signature changes
458 :     in newer versions of R (> 2.3)
459 :    
460 : feinerer 41 2006-03-12 Ingo Feinerer <h0125130@wu-wien.ac.at>
461 :    
462 :     * ext/R/importRIS.R: Automatic RIS import is now possible.
463 :    
464 : feinerer 40 2006-02-14 Ingo Feinerer <h0125130@wu-wien.ac.at>
465 :    
466 :     * R/textdoccol.R: Added RIS HTML input format.
467 :    
468 : feinerer 39 2006-01-21 Ingo Feinerer <h0125130@wu-wien.ac.at>
469 :    
470 :     * R/textdoccol.R: Removed bug that caused invalid text document
471 :     collections when handling many input files.
472 :    
473 : feinerer 36 2006-01-11 Ingo Feinerer <h0125130@wu-wien.ac.at>
474 :    
475 : feinerer 37 * R/textdoccol.R: Restructured and extended file import
476 :     mechanism.
477 :    
478 : feinerer 36 * inst/doc/clustering.Rnw: Adapted vignette for use with
479 :     ReutNews.rda
480 :    
481 :     * man/ReutNews.Rd: Documentation for ReutNews.rda
482 :    
483 :     * data/ReutNews.rda: A tiny Reuters21578 example data set.
484 :    
485 : feinerer 34 2005-12-22 Ingo Feinerer <h0125130@wu-wien.ac.at>
486 :    
487 :     * inst/doc/clustering.Rnw: Wrote a small vignette to present the
488 :     clustering facilities of this package.
489 :    
490 : feinerer 33 2005-12-15 Ingo Feinerer <h0125130@wu-wien.ac.at>
491 :    
492 :     * R/aobjects.R: Changed package document structure to avoid class
493 :     dependency problems.
494 :    
495 : feinerer 28 2005-12-06 Ingo Feinerer <h0125130@wu-wien.ac.at>
496 :    
497 : feinerer 29 * Wrote a script for the ModLewis Split for the Reuters-21578 XML
498 :     data set.
499 :    
500 : feinerer 28 * Finished documentation and reordered directory structure. Now "R
501 :     CMD check textmin" works without errors.
502 :    
503 : feinerer 27 2005-12-04 Ingo Feinerer <h0125130@wu-wien.ac.at>
504 :    
505 :     * src/: Various splits can now be easily created for the
506 :     Reuters21578 data set.
507 :    
508 : feinerer 26 2005-12-03 Ingo Feinerer <h0125130@wu-wien.ac.at>
509 :    
510 :     * Updated documentation
511 :    
512 : feinerer 25 2005-11-30 Ingo Feinerer <h0125130@wu-wien.ac.at>
513 :    
514 :     * Wrote R documentation for some classes and methods.
515 :    
516 : feinerer 21 2005-11-19 Ingo Feinerer <h0125130@wu-wien.ac.at>
517 :    
518 : feinerer 22 * R/textdoccol.R: Constructor of textdoccol allows import of CSV
519 :     files. See the questionnaire data/Umfrage.csv for such an example.
520 : feinerer 23 We are now able to import files in Reuters-21578 XML format.
521 : feinerer 22
522 : feinerer 21 * Changed class interfaces in various files. Weighting of the text
523 :     matrix is now possible.
524 :    
525 : feinerer 20 2005-11-08 Ingo Feinerer <h0125130@wu-wien.ac.at>
526 :    
527 :     * R/textdoccol.R: One can build term-document matrices if
528 :     nessecary (with buildTDM(...)) and fill the field tdm from a text
529 :     document collection with it.
530 :    
531 :     * R/textmatrix.R: Wrote S4 class for term-document matrices.
532 :    
533 : feinerer 19 2005-11-06 Ingo Feinerer <h0125130@wu-wien.ac.at>
534 :    
535 :     * R/textdoccol.R: We now can read in a whole XML file with several
536 :     news items.
537 :    
538 : feinerer 17 2005-11-05 Ingo Feinerer <h0125130@wu-wien.ac.at>
539 :    
540 :     * R/textdoccol.R: Set up an S4 class for a collection of text
541 :     documents. A first attempt to read in XML input (like the RCV1
542 :     set) was made.
543 :    
544 :     * R/textdocument.R: Set up an S4 class for text documents. Wrote
545 :     some accessor functions.
546 :    
547 :     * data/newsitem.xml: Added this XML file for testing purposes. It
548 :     contains a single news item from the Reuters Corpus Volume 1
549 :     (RCV1) XML set.
550 :    
551 : feinerer 16 2005-10-07 Ingo Feinerer <h0125130@wu-wien.ac.at>
552 :    
553 :     * R/textmatrix.R (textmatrix): Removed the transpose of the original
554 :     textmatrix as k-means clustering provided by R (kmeans) now works on
555 :     this textmatrix. The result is a k-means text clustering with a
556 :     similarity measure based upon word frequences.
557 :    
558 :     2005-10-05 Ingo Feinerer <h0125130@wu-wien.ac.at>
559 :    
560 :     * R/textmatrix.R: Adapted the preprocessing code from the R
561 :     package "lsa" written by Fridolin Wild to build a document text matrix.
562 :    
563 :     2005-10-02 Ingo Feinerer <h0125130@wu-wien.ac.at>
564 :    
565 :     * Set up the R Text Mining Package infrastructure.

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