如何将1个SD错误条添加到R中的条形图

data <- data.frame(Group = c("A", "B", "C"),
                   Value = c(10, 15, 12),
                   SD = c(2, 3, 1))

library(ggplot2)

plot <- ggplot(data, aes(x = Group, y = Value)) +
  geom_bar(stat = "identity", fill = "blue", width = 0.5) +
  labs(x = "Group", y = "Value") +
  ggtitle("Bar Chart with SD Error Bars")

print(plot)

plot <- plot +
  geom_errorbar(aes(ymin = Value - SD, ymax = Value + SD),
                width = 0.2, color = "red")

print(plot)