r - 水平图中的 3 个不同颜色区域

Question

试图绘制这个矩阵，使负值是红色，0 是蓝色，正值是绿色。

m <- matrix(c(0,0,-1,-2,0,0,1,0,1,3,3,3,-3,0,0,2),nrow = 4)

levelplot(m,at=c(-3,0,3),col.regions=c("red","blue","green"),xlab = xlab.a, ylab="", colorkey = FALSE, panel = function(...) {
  panel.fill(col = "blue")
  panel.levelplot(...)
})

标签： rlevelplot

Answer 1

m <- matrix(c(0,0,-1,-2,0,0,1,0,1,3,3,3,-3,0,0,2),nrow = 4)

levelplot(m,at=c(-3,-1,0,3),col.regions=c("red","blue","green"), xlab = "", ylab="", colorkey = FALSE, panel = function(...) {
  panel.fill(col = "blue")
  panel.levelplot(...)
})