r - 如何将 Highcharter 图保存为本地磁盘上的图像？

Question

hc %>% 
  hc_add_series(name = "London", data = citytemp$london, type = "area") %>% 
  hc_rm_series(name = "New York")

我想将 hc 导出为 png 或 jpg。这可以通过选择导出 - 另存为图像来完成，但我想通过代码来完成，因为我有多个图要导出。我尝试了以下方法，但它返回了一个空白图像:

png('hc.png', width = 800,height = 400)
print(hc)
dev.off()

Answer 1

这应该可以通过 webshot 包实现(参见此处的问题:https://github.com/jbkunst/highcharter/issues/186)

library(webshot)
library(highcharter)
library(plyr)

data("citytemp")

plot <- highchart() %>% 
  hc_add_series(name = "London", data = citytemp$london, type = "area") %>% 
  hc_rm_series(name = "New York")

htmlwidgets::saveWidget(widget = plot, file = "~/plot.html")
setwd("~")
webshot::webshot(url = "plot.html", 
                 file = "plot.png")