单元格之间的ggplot图块线

问题描述

我正在使用ggplot和geom_tile形成热图.我希望在单元之间插入一些微弱的线条.

I am using ggplot and geom_tile to form heatmaps. And I wish to insert some faint lines between the cells.

例如:

我的ggplot geom_tile热图:

My ggplot geom_tile heatmap:

library(ggplot2)
library(reshape2)
data("iris")
x = melt(cor(iris[,1:4]))
ggplot(data=x,aes(Var1,Var2,fill=value)) + geom_tile() # No line between the cells

我想要的东西(来自R中的d3heatmap包)

What I desire (from d3heatmap package in R)

library(d3heatmap)
data("iris")
x = cor(iris[,1:4])
d3heatmap(cor(iris[,1:4]),Rowv = F,Colv = F) #There is a faint line between the cells

(抱歉，无法发布任何图片)谢谢！

(Sorry can't post any pictures)Thanks!

推荐答案

只需将color = "gray"添加到您的geom_tile

Just add color = "gray" to your geom_tile

library(ggplot2)
library(reshape2)
data("iris")
x = melt(cor(iris[,1:4]))
ggplot(data=x,aes(Var1,Var2,fill=value)) +
  geom_tile(color = "gray")

将为您提供此图，并在图块之间加上线条:

Will give you this figure with lines between the tiles:

您可以使用size来放大或缩小线条，和/或使用color = white.

You can play with size to make the lines bigger or smaller , and/or use color = white.

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