[英]R: Plotting specific values in raster using different colour
How do I make only those raster cells white that are equal to zero ? 如何仅使那些等于零的栅格像元变白?
library(raster)
r <- raster(ncol=5, nrow=5)
val<- c(0,0,0.01,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.75,0.8,
0.85,0.9,0.95,1.0,1.2,1.3,1.63)
values(r) <- val
plot(r, col=c("gray","green","red","orange"),
breaks=c(0.1,0.4,0.8,1.2,1.63))
text(r, digits=2)
You had one more color than breaks, but otherwise, it seems to works all right: 您的颜色多于断点,但否则,它似乎可以正常工作:
library(raster)
r <- raster(ncol=5, nrow=5)
values(r) <- sort(runif(ncell(r), 0, 1.5))
plot(r, col=c("gray","green","red","orange","blue"),
breaks=c(0,0.1,0.4,0.8,1.2,1.63))
text(r, digits=2)
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