在R中使用ggplot2更改图例标题和标注失败

library(ggplot2)

# 创建示例数据
data <- data.frame(x = c(1, 2, 3), y = c(4, 5, 6), group = c("A", "B", "C"))

# 绘制散点图，并更改颜色图例标题
ggplot(data, aes(x, y, color = group)) +
  geom_point() +
  scale_color_discrete(name = "新的图例标题")

library(ggplot2)

# 创建示例数据
data <- data.frame(x = c(1, 2, 3), y = c(4, 5, 6), group = c("A", "B", "C"))

# 绘制散点图，并更改颜色图例标注
ggplot(data, aes(x, y, color = group)) +
  geom_point() +
  scale_color_manual(values = c("A" = "red", "B" = "blue", "C" = "green"))