I would like to do a "simple" thing. I would like to annotate a plot with some statistical information.
cor<-cor.test(PB.reg@data$x,PB.reg@data$y, method = "pearson")
label<-(paste("Passing Bablok Regression (n =", length(PB.reg@data$x),")",sep=""))
label2<-(paste("y = ", PB.reg@para[1,1], " + ",PB.reg@para[2,1], " * Method 1", sep=""))
label3<-(paste("R^2 = ",round(cor$estimate^2,3),sep="" ))
p<-ggplot(subset) +
aes(x = Rater_Mean, y = Smartphone_Mean, colour = Participant, label=Participant) +
geom_point(size = 2) +
scale_color_viridis_d(option = "inferno", alpha=0.8, direction=-1) +
theme_classic()+
geom_abline(intercept = PB.reg@para[1,1], slope = PB.reg@para[2,1],colour ="black", size=1, alpha=0.4)+
geom_abline(intercept = PB.reg@para[1,3], slope = PB.reg@para[2,3],colour ="#2c718e",linetype="dotted")+
geom_abline(intercept = PB.reg@para[1,4], slope = PB.reg@para[2,4],colour ="#2c718e",linetype="dotted")+
geom_abline(intercept = 0, slope = 1, linetype="dotted", color="red")
#geom_abline(intercept=seq(PB.reg@para[1,3],PB.reg@para[1,1],0.01), slope=PB.reg@para[2,3], alpha=0.2)+ #abline für LCI
#geom_abline(intercept=seq(PB.reg@para[1,4],PB.reg@para[1,1],0.01), slope=PB.reg@para[2,4], alpha=0.2) #abline für UCI
p<-p+
ggtitle("Method 1 vs Method 2")+
labs(x = "Method 1 [ms]", y = "Method 2 [ms]", title = "Method 1 vs Method 2")+
theme(text = element_text(size = 16),axis.text = element_text(size = 12),plot.title = element_text(hjust = 0.5))
ggdraw(p) + draw_label(label, .75, .2, size=12)+draw_label(label2, .75, .18,size=12)+draw_label(parse(text=lb1,keep.source = getOption("keep.source")), .75, .16,size=12)
As you can tell.... I got so far that I can annotate in the right bottom corner. Now I am struggeling with R^2. 1) How can I get the mathematical correct superscript? 2) Would it be possible to align all the draw_labels either left or right?