R plot raster colorscheme不是全范围

Question

我正在尝试使用从 Rcolorbrewer 包中获取的已定义配色方案绘制栅格，到目前为止没有问题。栅格的值范围从 0 到 1，没有 NA。

library(RColorBrewer)
library(classInt)

pal <- brewer.pal(n=50, name = "RdYlGn")
plot(rw_start_goal_stan, col=pal)

现在我尝试包含分位数中断，我使用 ClassInt 包计算

library(RColorBrewer)
library(classInt)

pal <- brewer.pal(n=50, name = "RdYlGn")
breaks.qt <- classIntervals(rw_start_goal_stan@data@values, style = "quantile")
plot(rw_start_goal_stan, breaks = breaks.qt$brks, col=pal)

错误地，plot() 仅将配色方案应用于值范围的 50%，其余部分保持白色。

我做错了什么？

Answer 1

编辑：使用来自this answer的OP和rasterVis::levelplot解决方案提供的数据

library(raster)
library(rasterVis)
library(classInt)

plotVar <- raster("LCPs_standartized.tif")

nColor <- 50
break1 <- classIntervals(plotVar[!is.na(plotVar)], 
                         n = nColor, style = "quantile")

lvp <- levelplot(plotVar, 
                 col.regions = colorRampPalette(brewer.pal(9, 'RdYlGn')), 
                 at = break1$brks, margin = FALSE)
lvp 

---

您需要指定classIntervals 中的颜色数量，然后将颜色代码分配给该classInterval 对象。

library(RColorBrewer)
library(classInt)

plotVar <- rw_start_goal_stan@data@values
nColor <- 50
plotColor <- brewer.pal(nColor, name = "RdYlGn")

# equal-frequency class intervals
class <- classIntervals(plotVar, nColor, style = "quantile")
# assign colors to classes from classInterval object
colorCode <- findColours(class, plotColor)

# plot
plot(rw_start_goal_stan)
plot(rw_start_goal_stan, col = colorCode, add = TRUE)

# specify the location of the legend, change -117 & 44 to numbers that fit your data
legend(-117, 44, legend = names(attr(colorCode, "table")),
  fill = attr(colorCode, "palette"), cex = 0.8, bty = "n")

来源：Maps in R