在 R 图形的图例中输入值

Question

我想知道如何调整我下面的图表。我的想法是在标签之前推出，并在此附件中。

Test <- structure(list(Category = c("FDE", "FDE", "FDE", "FDE"), 
Days = c(4, 1, 6, 1),Numbers= c(7, 3, 2, 1)), row.names = c(NA, 4L), class = "data.frame")

plot(Numbers ~ Days, xlab = "Days", ylab = "Numbers", xlim= c(0,10), ylim= c(0,10), data=Test)

xy <- unique(Test$Numbers)

points(0, xy, col = "red", pch = 19, cex = 2, xpd = TRUE)

legend("bottomright",inset=c(-0,-0), legend= round(xy,1),title="The number is é:",title.col = "black", cex = 1.2)

Answer 1

在前面paste点东西就行了。

legend("bottomright", inset=c(-0, -0), 
       legend=paste('USD', round(xy, 1)),
       title="The number is é:", title.col="black", cex=.9)