用R绘制网格

更新时间：2022-08-14 20:59:59

1. 用grid包，下面展示其用法。

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library(grid)
dat
y = rep(seq(0, 0.8, 1/5), each = 5),
val = rnorm(25, 20, 5))
# making relative values (%) to be used for color-gradiation in plot
dat$rel
# creating grey-tones relative to val -
# maximum greytone is relative to the val-maximum
# i use the reciprocal to get darker tones for higher values:
dat$col
# opening the graphic device and
# setting up a viewport with borders:
grid.newpage()
vp1
just = c("left", "bottom"), name = "vp1")
# plotting rectangles using x/y positions
grid.rect(x=dat$x,y=dat$y,height=1/5,width=1/5,hjust=0,vjust=0,vp=vp1,
gp=gpar(col=1, fill=as.character(dat$col)))

2. 输出为：

用R绘制网格

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