用于在R中使用Formattable包导出/保存表的命令 [英] Command for exporting/saving table made with Formattable package in R

问题描述

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

我一直在使用Formattable包在R中做一些漂亮的表。我试图保存表格作为图像（或真正的任何文件格式），但无法找到可用的命令。使用jpeg / png函数或dev.copy创建空白文档。理想情况下，我希望能够将这些表格保存在一个循环中。有没有人知道这可能如何完成？

I've been using the Formattable package to make some nice looking tables in R. I'm trying to save the tables as images (or really any file format) but can't find a command that works. Using the jpeg/png function or dev.copy creates blank documents. Ideally I'd like to be able to save these tables in a loop. Does anyone know how this might be done?

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)))
)

推荐答案

为了保存formattable，您可以使用'as.htmlwidget '然后打印它。
首先运行下一个函数：

To save you formattable you can use 'as.htmlwidget' and then printscreen it. First run the next function:

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）

然后在你的代码中，将formattable分配给变量，并使用该函数保存。

Then in your code assing the formattable to a variable and use the function to save it.

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")

祝贺。

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