我想使用Wordcloud功能在twitter数据上做云.我已经安装了twitter包并使用了api.之后我会做以下事情.
bigdata <- searchTwitter("#bigdata", n=20)
bigdata_list <- sapply(bigdata, function(x) x$getText())
bigdata_corpus <- Corpus(VectorSource(bigdata_list))
bigdata_corpus <- tm_map(bigdata_corpus, content_transformer(tolower), lazy=TRUE)
bigdata_corpus <- tm_map(bigdata_corpus, removePunctuation, lazy=TRUE)
bigdata_corpus <- tm_map(bigdata_corpus,
function(x)removeWords(x,stopwords()), lazy=TRUE)
wordcloud(bigdata_corpus)
这会生成Wordcloud命令的错误消息:
Error in UseMethod("meta", x) :
no applicable method for 'meta' applied to an object of class "try-error"
In addition: Warning messages:
1: In mclapply(x$content[i], function(d) tm_reduce(d, x$lazy$maps)) :
all scheduled cores encountered errors in user code
2: In mclapply(unname(content(x)), termFreq, control) :
all scheduled cores encountered errors in user code …