用Formattable软件包在R中导出/保存表格的命令

Question

https://cran.r-project.org/web/packages/formattable/formattable.pdf

我一直在使用Formattable包在R中制作一些好看的表格，我试图将表格保存为图像(或者实际上是任何文件格式)，但找不到一个有效的命令。使用jpeg/png函数或dev.copy创建空白文档。理想情况下，我希望能够在循环中保存这些表。有谁知道这可能是怎么做的吗？

数据：

library(formattable)
DF <- data.frame(Ticker=c("", "", "", "IBM", "AAPL", "MSFT"),
                 Name=c("Dow Jones", "S&P 500", "Technology", 
                        "IBM", "Apple", "Microsoft"),
                 Value=accounting(c(15988.08, 1880.33, NA, 
                                    130.00, 97.05, 50.99)),
                 Change=percent(c(-0.0239, -0.0216, 0.021, 
                                  -0.0219, -0.0248, -0.0399)))

formattable(DF, list(
  Name=formatter(
    "span",
    style = x ~ ifelse(x == "Technology", 
                       style(font.weight = "bold"), NA)),
  Value = color_tile("white", "orange"),
  Change = formatter(
    "span",
    style = x ~ style(color = ifelse(x < 0 , "red", "green")),
    x ~ icontext(ifelse(x < 0, "arrow-down", "arrow-up"), x)))
)

Answer 1

要保存您的格式化，您可以使用'as.htmlwidget‘，然后打印屏幕。首先运行下一个函数：

library("htmltools")
library("webshot")    

export_formattable <- function(f, file, width = "100%", height = NULL, 
                               background = "white", delay = 0.2)
    {
      w <- as.htmlwidget(f, width = width, height = height)
      path <- html_print(w, background = background, viewer = NULL)
      url <- paste0("file:///", gsub("\\\\", "/", normalizePath(path)))
      webshot(url,
              file = file,
              selector = ".formattable_widget",
              delay = delay)
    }

(来源：https://github.com/renkun-ken/formattable/issues/26)

然后在您的代码中将格式化表赋给一个变量，并使用函数保存它。

FT <- formattable(DF, list(
  Name=formatter("span", 
                 style = x ~ ifelse(x == "Technology", style(font.weight = "bold"), NA)), 
  Value = color_tile("white", "orange"), 
  Change = formatter("span", 
                     style = x ~ style(color = ifelse(x < 0 , "red", "green")), 
                     x ~ icontext(ifelse(x < 0, "arrow-down", "arrow-up"), x))) )

export_formattable(FT,"FT.png")

诚挚的问候。