topic_modeling | Topic Modeling using LDA and NMF in Python | Topic Modeling library
kandi X-RAY | topic_modeling Summary
kandi X-RAY | topic_modeling Summary
Topic Modeling using LDA and NMF in Python The code on this repository corresponds to a Medium Blog Post: This repository covers implementation of LDA and NMF on the ABC Million News Headlines dataset.
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QUESTION
I am trying to run through text2vec
's example on this page. However, whenever I try to see what the vocab_vectorizer
function returned, it's just an output of the function itself. In all my years of R coding, I've never seen this before, but it also feels funky enough to extend beyond just this function. Any pointers?
ANSWER
Answered 2020-May-22 at 15:30The output of vocab_vectorizer is supposed to be a function. I ran the function from the example in the documentation as below:
QUESTION
I was playing around with LDA in the text2vec
package and was confused why the fit_transfrom
and transform
were different when using the same data.
The documentation states that transform applys the learned model to new data but the result is a lot different than the one produced from fit_transform
ANSWER
Answered 2019-Jul-17 at 06:31Good question! Indeed there is an issue with CRAN version (and it mostly fixed in dev version on github). The issue is following:
- During
fit_transform
we learn both document-topic distribution and word-topic distribution. Once converged we save word-topic inside the model and return document-topic as result. - During
transform
we use fixed word-topic distribution and only infer document-topic. There is no guarantee that inferred document-topic will be the same and duringfit_transform
(but it should be close enough).
What we've changed in dev version - we run fit_transform
and transform
in order to have almost same document-topic distribution for each methods. (there are couple additional parameter tweaks in order to make sure they are exactly the same - see documentation for development version).
QUESTION
Suddently a "UnicodeDecodeError" arises in a code of mine which worked yesterday.
...File "D:\Anaconda\lib\site-packages\IPython\core\interactiveshell.py", line 3284, in run_code self.showtraceback(running_compiled_code=True)
File "D:\Anaconda\lib\site-packages\IPython\core\interactiveshell.py", line 2021, in showtraceback value, tb, tb_offset=tb_offset)
File "D:\Anaconda\lib\site-packages\IPython\core\ultratb.py", line 1379, in structured_traceback self, etype, value, tb, tb_offset, number_of_lines_of_context)
File "D:\Anaconda\lib\site-packages\IPython\core\ultratb.py", line 1291, in structured_traceback elist = self._extract_tb(tb)
File "D:\Anaconda\lib\site-packages\IPython\core\ultratb.py", line 1272, in _extract_tb return traceback.extract_tb(tb)
File "D:\Anaconda\lib\traceback.py", line 72, in extract_tb return StackSummary.extract(walk_tb(tb), limit=limit)
File "D:\Anaconda\lib\traceback.py", line 364, in extract f.line
File "D:\Anaconda\lib\traceback.py", line 286, in line self._line = linecache.getline(self.filename, self.lineno).strip()
File "D:\Anaconda\lib\linecache.py", line 16, in getline lines = getlines(filename, module_globals)
File "D:\Anaconda\lib\linecache.py", line 47, in getlines return updatecache(filename, module_globals)
File "D:\Anaconda\lib\linecache.py", line 137, in updatecache lines = fp.readlines()
File "D:\Anaconda\lib\codecs.py", line 321, in decode (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xf6 in position 2441: invalid start byte
ANSWER
Answered 2019-May-15 at 17:16Without seeing the what's at position 2441 I'm not entirely sure, but it is probably one of the following:
- A special, non-ascii/extended ascii character, in which case do
the_string.encode("UTF-8")
or when opening doencoding = "UTF-8"
in theopen
function - You have
\u
or\U
somewhere and this makes the next characters read as part of a Unicode sequence so dorepr(the_string)
to add backslashes to nullify backslashes after (Probably not this one) - You are reading a
bytes
object not astr
object. Try opening it withr+b
(read & write, bytes) in theopen
function
I've more or less thrown spaghetti at a wall but I hope this helps!
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