如何操縱tmap傳奇？

Question

我正在創建一個關於鳥類每年變化百分比的專題圖。 這是我的代碼：

tm_shape(grid83)+
  tm_fill("trend", title = "Percent change per Year", textNA = "None counted", style="fixed",
    breaks=c(-Inf, -1.5, -0.25, 0.25, 1.5, Inf),
    palette = c("red", "orange", "yellow", "turquoise", "blue", "white"))+
  tm_borders(NA)+
tm_shape(uscan83)+ # add US and CAN 
  tm_borders()+
tm_layout(
  "Western Grebe",
  legend.title.size=1,
  legend.text.size = 0.6,
  legend.position = c("left","bottom"),
  legend.bg.color = "white",
  legend.digits = 5,
  legend.bg.alpha = 1)

目前，所有NA值都顯示為灰色。 我試圖改變調色板：

palette = c("red", "orange", "yellow", "turquoise", "blue", "white"))

但這似乎沒有用。 NA值仍然是灰色的。 我究竟做錯了什么？

非常感謝！

Answer 1

所以你試圖專門為NA值改變顏色？ tm_fill()的colorNA參數用於此目的。

這是一個例子：

library(tmap)
data(Europe)
tm_shape(Europe) +
tm_fill("gdp_cap_est", title = "GDP", style = "fixed",
        breaks = c(0, 10000, 20000, 30000, 40000, Inf),
        textNA = "Dunno", 
        colorNA = "green",   # <-------- color for NA values
        palette = c("red", "orange", "yellow", "turquoise", "blue", "white")) +
tm_borders() +
tm_layout("Wealth (or so)",
          legend.title.size = 1,
          legend.text.size = 0.6,
          legend.position = c("left","bottom"),
          legend.bg.color = "white",
          legend.digits = 5,
          legend.bg.alpha = 1)

它看起來像這樣：