R中的热图，其中细胞面积与观察成比例

Question

我想在R中生成热图，其中单元格区域和颜色由两列控制。例如，在下面的数据中，我希望每个单元格的面积与“计数”列成比例，颜色由“度量”列控制，并在每个单元格上放置“等级”标签。我怎么能在R？中做到这一点？

   Event    measure rank    Count
   A         20     1      2000
   B         15     2      1870
   C         10     3      1540
   D         5      4      1200

Answer 1

您正在寻找的地图类型称为树形图。 我已编辑了答案，根据您的评论在地块下方添加了一张表格。

library("treemap")
library("grid")
library("gridExtra")

mydat <- structure(list(Event = structure(1:4, .Label = c("A", "B", "C",
  "D"), class = "factor"), measure = c(20L, 15L, 10L, 5L), rank = 1:4,
  Count = c(2000L, 1870L, 1540L, 1200L)), .Names = c("Event",
    "measure", "rank", "Count"), class = "data.frame", row.names = c(NA, -4L))

# Setup the parent layout viewport
  layout_vp <- viewport(layout = grid.layout(nrow = 2, ncol = 1,
  widths = unit(c(1, 1), "npc"),
  heights = unit(c(0.6, 0.4), "npc")), name = "lay_vp")

# Specify the location of the top and bottom viewports for the tree plot and table
  tree_vp <- viewport(layout.pos.col = NULL, layout.pos.row = 1, name = "vp_top")
  table_vp <- viewport(layout.pos.col = NULL, layout.pos.row = 2, name = "vp_bottom",
  height = unit(0.1, "npc"))

# Create grob for table
  table_grob <- tableGrob(mydat, rows = NULL, vp = table_vp)

# Combining the treemap and table
  grid.newpage()
  pushViewport(layout_vp)
  pushViewport(tree_vp)
  treemap(mydat, index = "rank", vSize = "Count", vColor = "measure", type = "value",
      position.legend = "none", vp = tree_vp)
  popViewport()
  pushViewport(table_vp)
  grid.draw(table_grob)
  popViewport()

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