创建包含在特定图像中的wordcloud

Question

我刚刚尝试使用wordcloud2创建包含在Africa continent中的wordcloud，但看不到图像中的单词。

library(wordcloud2)

cloud <- data.frame(
  word = c(
  "Atlantic",
  "Coho",
  "Rainbow",
  "Arctic",
  "Chinook",
  "Danube",
  "Grayling"
),
freq = c(
  6,
  7,
  9,
  10,
  3,
  9,
  2
))
wordcloud2(data = cloud,
       figPath = "africa3.png"
       )

更新

我以某种方式解决了这个问题，但是这些单词在image中并不适合。有人可以改善以下代码：

myFun <- function(n = 5000) {
      a <- do.call(paste0, replicate(5, sample(LETTERS, n, TRUE), FALSE))
      paste0(a, sprintf("%04d", sample(9999, n, TRUE)), sample(LETTERS, n, TRUE))
    }

    cloud <- data.frame(
      word =  myFun(100),
      freq = sample(30, size = 100, replace = TRUE))

    wordcloud2(data = cloud, figPath = "africa4.png",color = "skyblue",shuffle = F, size = 0.5, ellipticity = 1.5)