gWidgetsRGtk2 当前已经从 CRAN 上移除了，还好书中相关代码并没有运行，看来替换成 shiny 是大势所趋

XiangyunHuang · XiangyunHuang · commit 45a6a8932b02 · 2020-06-28T23:00:40.000+08:00
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -18,7 +18,6 @@ Imports:
     ggplot2,
     ggpointdensity,
     gifski,
-    gWidgetsRGtk2,
     heatmaply,
     igraph,
     iplots,
