單色 plotly map

Question

如何僅用一種顏色渲染plotly map。 在下面的示例中，我希望所有狀態的填充為紅色，或#FF0000 。

library(plotly)
library(tidyverse)

dat <- data.frame(state = state.abb)

plot_ly(dat,
        type = "choropleth",
        locationmode = 'USA-states',
        locations = ~state) %>% 
  add_trace(color = "red") %>%
  layout(geo = list(
    projection = list(
      type = "albers usa")))

Answer 1

根據我對 plotly文檔的了解，這是實現它的一種方法（cloropleth 是一種熱圖，但你想要一種顏色）：

library(plotly)

dat <- data.frame(state = state.abb)

plot_ly(dat,
        type = "scattergeo",
        mode = 'none',
        locationmode = 'USA-states',
        locations = ~state) %>%
 layout(geo = list(landcolor = "#FF0000",
                   showland = TRUE,
                   projection = list(type = "albers usa")))