1

当我尝试打印由 knitr 生成的 HTML 时，打印页面会丢失所有颜色和格式。有没有办法在不丢失格式的情况下打印 HTML 输出？我已经尝试通过使用this建议的css来解决这个问题，但是没有任何区别。

样式.css 

@media print {
body {-webkit-print-color-adjust: exact;}
}

@media print {
table {-webkit-print-color-adjust: exact;}
}

降价代码：

---
title: "Habits"
output:
  html_document:
    css: styles.css

---

```{r, echo = FALSE}

df <- data.frame(
  id = 1:10,
  name = c("Bob", "Ashley", "James", "David", "Jenny", 
    "Hans", "Leo", "John", "Emily", "Lee"), 
  age = c(28, 27, 30, 28, 29, 29, 27, 27, 31, 30),
  grade = c("C", "A", "A", "C", "B", "B", "B", "A", "C", "C"),
  test1_score = c(8.9, 9.5, 9.6, 8.9, 9.1, 9.3, 9.3, 9.9, 8.5, 8.6),
  test2_score = c(9.1, 9.1, 9.2, 9.1, 8.9, 8.5, 9.2, 9.3, 9.1, 8.8),
  final_score = c(9, 9.3, 9.4, 9, 9, 8.9, 9.25, 9.6, 8.8, 8.7),
  registered = c(TRUE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE, FALSE, FALSE, FALSE),
  stringsAsFactors = FALSE)

```

``` {r, eval = TRUE, echo = FALSE, results='asis'}

library(formattable)

formattable(df, list(
  age = color_tile("white", "orange"),
  grade = formatter("span",
    style = x ~ ifelse(x == "A", style(color = "green", font.weight = "bold"), NA)),
  final_score = formatter("span",
    style = x ~ style(color = ifelse(rank(-x) <= 3, "green", "gray")),
    x ~ sprintf("%.2f (rank: %02d)", x, rank(-x))),
  registered = formatter("span", 
    style = x ~ style(color = ifelse(x, "green", "red")),
    x ~ icontext(ifelse(x, "ok", "remove"), ifelse(x, "Yes", "No")))
))

```
4

1 回答 1

1

一个不能完全解决问题但允许您打印带有颜色的降价表的解决方案是将格式化表导出为图像，以便实际降价表上的表是 png 文件类型。下面是一个功能，您可以将其应用于您的表格。

export_formattable <- function(f, file, width = "100%", height = NULL, 
                               background = "white", delay = 0.2,
                               width_svg=720, height_svg=740){
  w <- as.htmlwidget(f, width = width_svg, height = height_svg)
  path <- html_print(w, background = background, viewer = NULL)
  url <- paste0("file:///", gsub("\\\\", "/", normalizePath(path)))
  webshot(url,
          file = file,
          selector = ".formattable_widget",
          delay = delay)
}

将此应用于您的表：

formattble_table <- formattable(df, list(
  age = color_tile("white", "orange"),
  grade = formatter("span",
    style = x ~ ifelse(x == "A", style(color = "green", font.weight = "bold"), NA)),
  final_score = formatter("span",
    style = x ~ style(color = ifelse(rank(-x) <= 3, "green", "gray")),
    x ~ sprintf("%.2f (rank: %02d)", x, rank(-x))),
  registered = formatter("span", 
    style = x ~ style(color = ifelse(x, "green", "red")),
    x ~ icontext(ifelse(x, "ok", "remove"), ifelse(x, "Yes", "No")))
))

export_formattable(formattble_table, "formattble_table.png")

这篇文章有助于找到导出表格的解决方案：Command for exporting/saving table made with Formattable package made in R。

为 faaabyan 干杯 ​​- https://stackoverflow.com/users/4065921/faaabyan找到此导出解决方案。

于 2019-09-26T14:05:17.773 回答