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Plot a word cloud
wordcloud(words,freq,scale=c(4,.5),min.freq=3,max.words=Inf,
random.order=TRUE, random.color=FALSE, rot.per=.1,
colors="black",ordered.colors=FALSE,use.r.layout=FALSE,
fixed.asp=TRUE, ...)the words
their frequencies
A vector of length 2 indicating the range of the size of the words.
words with frequency below min.freq will not be plotted
Maximum number of words to be plotted. least frequent terms dropped
plot words in random order. If false, they will be plotted in decreasing frequency
choose colors randomly from the colors. If false, the color is chosen based on the frequency
proportion words with 90 degree rotation
color words from least to most frequent
if true, then colors are assigned to words in order
if false, then c++ code is used for collision detection, otherwise R is used
if TRUE, the aspect ratio is fixed. Variable aspect ratio only supported if rot.per==0
Additional parameters to be passed to text (and strheight,strwidth).
nothing
If freq is missing, then words can either be a character vector, or Corpus. If it is a vector and freq is missing, standard stop words will be removed prior to plotting.
# NOT RUN {
wordcloud(c(letters, LETTERS, 0:9), seq(1, 1000, len = 62))
if(require(tm)){
##### from character #####
wordcloud(
"Many years ago the great British explorer George Mallory, who
was to die on Mount Everest, was asked why did he want to climb
it. He said, \"Because it is there.\"
Well, space is there, and we're going to climb it, and the
moon and the planets are there, and new hopes for knowledge
and peace are there. And, therefore, as we set sail we ask
God's blessing on the most hazardous and dangerous and greatest
adventure on which man has ever embarked.",
,random.order=FALSE)
# }
# NOT RUN {
data(crude)
crude <- tm_map(crude, removePunctuation)
crude <- tm_map(crude, function(x)removeWords(x,stopwords()))
##### from corpus #####
wordcloud(crude)
##### from frequency counts #####
tdm <- TermDocumentMatrix(crude)
m <- as.matrix(tdm)
v <- sort(rowSums(m),decreasing=TRUE)
d <- data.frame(word = names(v),freq=v)
wordcloud(d$word,d$freq)
#A bigger cloud with a minimum frequency of 2
wordcloud(d$word,d$freq,c(8,.3),2)
#Now lets try it with frequent words plotted first
wordcloud(d$word,d$freq,c(8,.5),2,,FALSE,.1)
##### with colors #####
if(require(RColorBrewer)){
pal <- brewer.pal(9,"BuGn")
pal <- pal[-(1:4)]
wordcloud(d$word,d$freq,c(8,.3),2,,FALSE,,.15,pal)
pal <- brewer.pal(6,"Dark2")
pal <- pal[-(1)]
wordcloud(d$word,d$freq,c(8,.3),2,,TRUE,,.15,pal)
#random colors
wordcloud(d$word,d$freq,c(8,.3),2,,TRUE,TRUE,.15,pal)
}
##### with font #####
wordcloud(d$word,d$freq,c(8,.3),2,,TRUE,,.15,pal,
vfont=c("gothic english","plain"))
wordcloud(d$word,d$freq,c(8,.3),2,100,TRUE,,.15,pal,vfont=c("script","plain"))
wordcloud(d$word,d$freq,c(8,.3),2,100,TRUE,,.15,pal,vfont=c("serif","plain"))
# }
# NOT RUN {
}
# }
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