1 效果

左边是默认，右边是自定义颜色后。

2 代码

# named color
color.head=c('#617381', "#76AB9B", '#CE5A5B', "#EA7C5B");
names(color.head) =c("NL", "LP", "CA", "LN")
color.head
# draw with Seurat
g1=DotPlot(scObj, features = c("CD300LF"), group.by = "tissue.type", cluster.idents = F)+labs(x="", y="") + NoLegend(); g1 #+ #+RotatedAxis() #+ coord_flip()
# >> get data from ggplot obj
head(g1$data)
#            avg.exp  pct.exp features.plot id avg.exp.scaled
#CD300LF  0.04571820 4.370236       CD300LF CA      1.0291080
#CD300LF1 0.03949094 4.144320       CD300LF LN      0.6632240# re-plot with ggplot2
ggplot(g1$data, aes(x=features.plot, y=id, size=pct.exp, color=id))+geom_point(show.legend = F)+scale_color_manual(values=color.head)+theme_classic(base_size = 14)+labs(x="", y="")
#