我正在尝试使用R studio创建气泡图,我的代码如下:
library(ggplot2)
bone$gr = bone$Line
ggplot(bone, aes(x = Year, y = bup, size = Patients, col = gr)) + geom_point() +
geom_abline(intercept = -1.433254613, slope = 0.000836604, col = "red") +
geom_abline(intercept = -2.384481355, slope = 0.001309739, col = "blue")
gr是一个组/类变量,它将数据集分为两组,我想用不同的颜色显示两组,如下图所示:
有什么办法可以改变两组的颜色吗?