[R] Run all plotting examples

.github/workflows/r_tests.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Install system dependencies
         run: |
           sudo apt update
-          sudo apt install libcurl4-openssl-dev libssl-dev libssh2-1-dev libgit2-dev libglpk-dev libxml2-dev libharfbuzz-dev libfribidi-dev
+          sudo apt install libcurl4-openssl-dev libssl-dev libssh2-1-dev libgit2-dev libglpk-dev libxml2-dev libharfbuzz-dev libfribidi-dev librsvg2-dev librsvg2-2
         if: matrix.os == 'ubuntu-latest'
       - uses: actions/checkout@v4
         with:
@@ -76,7 +76,7 @@ jobs:
         run: |
           # Must run before checkout to have the latest git installed.
           # No need to add pandoc, the container has it figured out.
-          apt update && apt install libcurl4-openssl-dev libssl-dev libssh2-1-dev libgit2-dev libglpk-dev libxml2-dev libharfbuzz-dev libfribidi-dev git -y
+          apt update && apt install libcurl4-openssl-dev libssl-dev libssh2-1-dev libgit2-dev libglpk-dev libxml2-dev libharfbuzz-dev libfribidi-dev git librsvg2-dev librsvg2-2 -y
       - name: Trust git cloning project sources
         run: |
           git config --global --add safe.directory "${GITHUB_WORKSPACE}"

R-package/DESCRIPTION

@@ -51,6 +51,9 @@ Suggests:
     rmarkdown,
     ggplot2 (>= 1.0.1),
     DiagrammeR (>= 0.9.0),
+    DiagrammeRsvg,
+    rsvg,
+    htmlwidgets,
     Ckmeans.1d.dp (>= 3.3.1),
     vcd (>= 1.3),
     testthat,

R-package/R/xgb.plot.multi.trees.R

@@ -50,17 +50,12 @@
 #' p <- xgb.plot.multi.trees(model = bst, features_keep = 3)
 #' print(p)
 #'
-#' \dontrun{
 #' # Below is an example of how to save this plot to a file.
-#' # Note that for export_graph() to work, the {DiagrammeRsvg} and {rsvg} packages
-#' # must also be installed.
-#'
-#' library(DiagrammeR)
-#'
-#' gr <- xgb.plot.multi.trees(model = bst, features_keep = 3, render = FALSE)
-#' export_graph(gr, "tree.pdf", width = 1500, height = 600)
+#' if (require("DiagrammeR") && require("DiagrammeRsvg") && require("rsvg")) {
+#'   fname <- file.path(tempdir(), "tree.pdf")
+#'   gr <- xgb.plot.multi.trees(bst, features_keep = 3, render = FALSE)
+#'   export_graph(gr, fname, width = 1500, height = 600)
 #' }
-#'
 #' @export
 xgb.plot.multi.trees <- function(model, features_keep = 5, plot_width = NULL, plot_height = NULL,
                                  render = TRUE, ...) {

R-package/R/xgb.plot.tree.R

@@ -53,16 +53,12 @@
 #' # plot the first tree
 #' xgb.plot.tree(model = bst, tree_idx = 1)
 #'
-#'
-#' \dontrun{
 #' # Below is an example of how to save this plot to a file.
-#'
-#' library(DiagrammeR)
-#'
-#' gr <- xgb.plot.tree(model = bst, tree_idx = 1)
-#' htmlwidgets::saveWidget(gr, 'plot.html')
+#' if (require("DiagrammeR") && require("htmlwidgets")) {
+#'   fname <- file.path(tempdir(), "plot.html'")
+#'   gr <- xgb.plot.tree(bst, tree_idx = 1)
+#'   htmlwidgets::saveWidget(gr, fname)
 #' }
-#'
 #' @export
 xgb.plot.tree <- function(model,
                           tree_idx = 1,

R-package/tests/helper_scripts/install_deps.R

@@ -13,6 +13,9 @@ pkgs <- c(
   "rmarkdown",
   "ggplot2",
   "DiagrammeR",
+  "DiagrammeRsvg",
+  "rsvg",
+  "htmlwidgets",
   "Ckmeans.1d.dp",
   "vcd",
   "lintr",