how can one increase size of plotted area wordclouds in R
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28-04-2021 - |
题
trying to replicate the example here;
http://onertipaday.blogspot.com/2011/07/word-cloud-in-r.html
Need help figuring out how to increase the plotted area of the word cloud. Changing the height and width parmeters in png("wordcloud_packages.png", width=1280,height=800) only changes the height and width of the canvas..but the plotted area remains small.
require(XML)
require(tm)
require(wordcloud)
require(RColorBrewer)
u = "http://cran.r-project.org/web/packages/available_packages_by_date.html"
t = readHTMLTable(u)[[1]]
ap.corpus <- Corpus(DataframeSource(data.frame(as.character(t[,3]))))
ap.corpus <- tm_map(ap.corpus, removePunctuation)
ap.corpus <- tm_map(ap.corpus, tolower)
ap.corpus <- tm_map(ap.corpus, function(x) removeWords(x, stopwords("english")))
ap.tdm <- TermDocumentMatrix(ap.corpus)
ap.m <- as.matrix(ap.tdm)
ap.v <- sort(rowSums(ap.m),decreasing=TRUE)
ap.d <- data.frame(word = names(ap.v),freq=ap.v)
table(ap.d$freq)
pal2 <- brewer.pal(8,"Dark2")
png("wordcloud_packages.png", width=1280,height=800)
wordcloud(ap.d$word,ap.d$freq, scale=c(8,.2),min.freq=3,
max.words=Inf, random.order=FALSE, rot.per=.15, colors=pal2)
dev.off()
解决方案
Try using the res
parameter, instead:
...
png("wordcloud_packages.png", width=12,height=8, units='in', res=300)
...
其他提示
If you include par(mar = rep(0, 4))
as a separate line immediately after the call to png
you'll remove the margins, and the wordcloud will use all the available space. With this, and possibly tweaking the res
parameter as suggested in the previous answer, you should get what you wanted.
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