如何对ggplot2轴中的单个值使用多种颜色？

library(ggplot2)

# 创建数据框
data <- data.frame(x = c(1, 2, 3, 4, 5),
                   y = c(1, 2, 3, 4, 5),
                   label = c("A", "B", "C", "D", "E"))

# 创建ggplot对象并绘制散点图
plot <- ggplot(data, aes(x, y, color = label)) +
  geom_point(size = 3)

# 设置颜色映射
plot <- plot + scale_color_manual(values = c("red", "blue", "green", "orange", "purple"),
                                  labels = c("A", "B", "C", "D", "E"))

# 设置标题和轴标签
plot <- plot + labs(title = "Scatter Plot",
                    x = "X-axis",
                    y = "Y-axis")

# 显示图形
plot