Try adding: theme(cere.margin = margin(2,2,2,2, "cm")). This will set the margin of the facet label to center it.
ggplot(ALL, aes(rowname,value))+
geom_point(size = 5,color="red")+
theme_set(theme_bw())+
theme(axis.text = element_text(size=26))+
theme(text=element_text(hjust=1,size=26))+
theme(plot.title = element_text(size = 26,hjust=0.5))+
theme(axis.title =element_text(size = 26,hjust=0.5) )+
scale_x_continuous(limits = c(-2.5, 110))+
theme(panel.border = element_rect(fill=NA,color="black", size=1, linetype="solid"))+
theme(axis.line = element_line(size = 1, colour = "black", linetype = 1)) +
geom_smooth(method = "lm",color="blue",formula = y~x,size=2,linetype = 1,alpha = 0.5)+
labs(x="time",y="dissmility",colour = "Cylinders",title = "winter.YX",tag = waiver())+
facet_grid(site~season,scales = 'free_x')+scale_x_continuous(expand = c(0, 3))####删除标签分面缓冲区
0 Answer
Try adding: theme(cere.margin = margin(2,2,2,2, "cm")). This will set the margin of the facet label to center it.
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