Displaying 6 results from an estimated 6 matches for "lowfreq".
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2005 Oct 19
2
Filter design in R?
Dr. Williams,
I ran across your inquiry on one of the R-help mailing lists regarding
digital filter design and implementation. I found no response to your
email in the archives and was wondering if you were able to find anything.
Thanks,
Israel
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Israel Christie, Ph.D.
Email: ichristie at gmail.com
Phone: 865.766.0214
Mobile: 865.406.4615
2010 Feb 28
1
Combining 2 columns into 1 column many times in a very large dataset
*Combining 2 columns into 1 column many times in a very large dataset*
The clumsy solutions I am working on are not going to be very fast if I can
get them to work and the true dataset is ~1500 X 45000 so they need to be
efficient. I've searched the R help files and the archives for this list and
have some possible workable solutions for 2) and 3) but not my question 1).
However, I include
2012 Dec 13
2
Tamaño de la matriz de términos y memoria. Paquete TM
...matriz de terminos
#a) términos como filas y documentos como columnas
dtm <- DocumentTermMatrix(corpus)
inspect(dtm[1000:1005,1000:1005])
# Términos con frecuencia mínima igual a 30:
findFreqTerms(dtm, lowfreq=30)
# remueve términos con baja frecuencia
inspect(removeSparseTerms(dtm, 0.4))
# nube de palabras
m <- as.matrix(dtm)
v <- sort(rowSums(m),decreasing=TRUE)
df <- data.frame(word = names(v),freq=v)
wordcloud(df$word,df$freq,mi...
2011 Nov 09
0
Min Frequency in findFreqTerms
...erm matrix are shown below:
(bpd) (bpd). (gcc)
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
1 0 0
0 0 0
0 0 0
0 0 0
1 0 0
1 0 0
0 0 1
0 0 0
0 1 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
The first term "(bpd)" has a frequency of 3 whereas the second and third
terms have a frequency of 1 which is below the lowfreq = 2 specified.
Can someone help me whether this is the right way of interpreting this
function??? If so, is there a bug in the package??
Thank you.
Ravi
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2011 Sep 12
1
findFreqTerms vs minDocFreq in Package 'tm'
...ds that appear more than 5 times but
minDocFreq identifies only 659 terms. Can someone please explain the reason
for the different or whether I have misunderstood their definitions??
>tdm1 <- TermDocumentMatrix(tr1,control=list(weighting=weightBin))
> freq_terms <- findFreqTerms(tdm1, lowfreq =5, highfreq = Inf)
> str(freq_terms)
chr [1:3140] "abc" "abil" "abl" "abnorm" "abort" "absenc" ...
> tdm2 <- TermDocumentMatrix(tr1,control=list(minDocFreq=5,minWordLength=1))
> str(tdm2)
List of 6
$ i : int [1:4703...
2014 Jul 29
2
wordcloud y tabla de palabras [Avanzando]
Buenas tardes grupo. Saludos cordiales Carlos J., muchas gracias por
tu orientación. Efectivamente, me había dado cuenta que la razón por
la que no se aplicaba colnames era porque no tenía columnas. La
cuestión es que no logro visualizar completamente/claramente en qué
parte del proceso de creación del corpus se puede hacer.
Sin embargo, siguiendo el ejemplo de