R：将多个 html 小部件保存在一起

Question

我正在使用 R 编程语言。我有兴趣学习如何将几个“html 小部件”保存在一起。我已经能够手动创建不同类型的 html 小部件：

#widget 1
library(htmlwidgets)
library(leaflet)
library(RColorBrewer)

# create map data
map_data <- data.frame(
  "Lati" = c(43.6426, 43.6424, 43.6544, 43.6452, 43.6629), "Longi" = c(-79.3871, -79.3860, -79.3807, -79.3806, -79.3957),
  "Job" = c("Economist", "Economist", "Teacher", "Teacher", "Lawyer"),
  "First_Name" = c("John", "James", "Jack", "Jason", "Jim"),
  "Last_Name" = c("Smith", "Charles", "Henry", "David", "Robert"),
  "vehicle" = c("car", "van", "car", "none", "car")
)

kingdom <- c("Economist", "Lawyer", "Teacher")
my_palette <- brewer.pal(3, "Paired")
factpal <- colorFactor(my_palette, levels = kingdom)

groups <- unique(map_data$Job)

# finalize map
map <- leaflet(map_data) %>%
  addTiles(group = "OpenStreetMap") %>% 
  addCircleMarkers(~Longi, ~Lati, popup = ~Job,
                   radius = 10, weight = 2, opacity = 1, color = ~factpal(Job),
                   fill = TRUE, fillOpacity = 1, group = ~Job
  )

widget_1 = map %>%
  addLayersControl(overlayGroups = groups, options = layersControlOptions(collapsed = FALSE)) %>%
  addTiles() %>%
  addMarkers(lng = ~Longi, 
             lat = ~Lati, 
             popup = ~paste("Job", Job, "<br>", 
                            "First_Name:", First_Name, "<br>", 
                            "Last_Name:", Last_Name, "<br>", "vehicle:", vehicle, "<br>"))

小部件 2：

##### widget 2

library(plotly)
library(ggplot2)

p_plot <- data.frame(frequency = c(rnorm(31, 1), rnorm(31)),
                     is_consumed = factor(round(runif(62))))
p2 <- p_plot %>%
  ggplot(aes(frequency, fill = is_consumed)) +
  geom_density(alpha = 0.5)     

widget_2 = ggplotly(p2)

小部件 3：

#####widget_3

today <- Sys.Date()
tm <- seq(0, 600, by = 10)
x <- today - tm
y <- rnorm(length(x))
widget_3 <- plot_ly(x = ~x, y = ~y, mode = 'lines', text = paste(tm, "days from today"))

小部件 4：

####widget_4

library(igraph)
library(dplyr)
library(visNetwork)


Data_I_Have <- data.frame(
   
    "Node_A" = c("John", "John", "John", "Peter", "Peter", "Peter", "Tim", "Kevin", "Adam", "Adam", "Xavier"),
    "Node_B" = c("Claude", "Peter", "Tim", "Tim", "Claude", "Henry", "Kevin", "Claude", "Tim", "Henry", "Claude")
)


graph_file <- data.frame(Data_I_Have$Node_A, Data_I_Have$Node_B)


colnames(graph_file) <- c("Data_I_Have$Node_A", "Data_I_Have$Node_B")

graph <- graph.data.frame(graph_file, directed=F)
graph <- simplify(graph)


nodes <- data.frame(id = V(graph)$name, title = V(graph)$name)
nodes <- nodes[order(nodes$id, decreasing = F),]
edges <- get.data.frame(graph, what="edges")[1:2]

widget_4 = visNetwork(nodes, edges) %>%   visIgraphLayout(layout = "layout_with_fr") %>%
    visOptions(highlightNearest = TRUE, nodesIdSelection = TRUE)

从这里，我发现了另一个 stackoverflow 帖子，其中提出了类似的问题：Using R and plot.ly, how to save multiples htmlwidgets to my html?

在这篇文章中，它解释了如何将多个 html 小部件保存在一起 - 回答问题的人编写了一个函数来这样做：

library(htmltools)
save_tags <- function (tags, file, selfcontained = F, libdir = "./lib") 
{
  if (is.null(libdir)) {
    libdir <- paste(tools::file_path_sans_ext(basename(file)), 
                    "_files", sep = "")
  }
  htmltools::save_html(tags, file = file, libdir = libdir)
  if (selfcontained) {
    if (!htmlwidgets:::pandoc_available()) {
      stop("Saving a widget with selfcontained = TRUE requires pandoc. For details see:\n", 
           "https://github.com/rstudio/rmarkdown/blob/master/PANDOC.md")
    }
    htmlwidgets:::pandoc_self_contained_html(file, file)
    unlink(libdir, recursive = TRUE)
  }
  return(htmltools::tags$iframe(src= file, height = "400px", width = "100%", style="border:0;"))
}

我尝试使用此功能将 4 个小部件保存在一起：

save_tags(widget_1, widget_2, widget_3, widget_4)

但是这样做，我得到了以下错误：

 Error in dirname(file) : a character vector argument expected 

有没有一种直接简单的方法可以将多个 html 小部件保存在一起？

谢谢

注意：我知道您可以在 R 中使用 combineWidgets() 函数：

library(manipulateWidget)
combineWidgets(widget_1, widget_2, widget_3, widget_4)

但是，我使用的计算机没有互联网接入或 USB 端口。这台计算机预装了带有有限库的 R 副本（它具有我的问题中使用的所有库，除了“manipulateWidget”）。我正在寻找将多个 html 小部件保存在一起的最简单方法（例如，这在 base R 中是否可行）？

谢谢

Answer 1

如果格式不重要，可以使用 tagList 合并小部件并直接保存：

htmltools::save_html(tagList(widget_1, widget_2, widget_3, widget_4), file = "C://Users//Me//Desktop//widgets.html")

（不用说您需要编辑文件路径！）

如果要控制小部件的布局，可以将每个小部件包装在一个 div 中，然后设置它们的样式：

doc <- htmltools::tagList(
  div(widget_1, style = "float:left;width:50%;"),
  div(widget_2,style = "float:left;width:50%;"),
  div(widget_3, style = "float:left;width:50%;"),
  div(widget_4, style = "float:left;width:50%;")
)

htmltools::save_html(html = doc, file = "C://Users//Me//Desktop//widgets.html")