使用geom_line绘制多条线(基于分组)

# 安装并加载 ggplot2 包
install.packages("ggplot2")
library(ggplot2)

# 创建示例数据
data <- data.frame(
  x = rep(1:10, 3),
  y = c(rnorm(10, 5, 1), rnorm(10, 10, 1), rnorm(10, 15, 1)),
  group = factor(rep(c("A", "B", "C"), each = 10))
)

# 绘制基于分组的线图
ggplot(data, aes(x = x, y = y, group = group)) +
  geom_line(aes(color = group)) +
  geom_point(aes(color = group)) +
  labs(title = "基于分组的线图", x = "X轴", y = "Y轴", color = "组别")

ggplot(data, aes(x = x, y = y, group = group)) +
  geom_line(aes(color = group), size = 1.5, alpha = 0.7) +
  geom_point(aes(color = group)) +
  labs(title = "基于分组的线图", x = "X轴", y = "Y轴", color = "组别")

ggplot(data, aes(x = x, y = y, group = group)) +
  geom_line(aes(color = group)) +
  geom_point(aes(color = group)) +
  scale_color_manual(values = c("A" = "red", "B" = "green", "C" = "blue")) +
  labs(title = "基于分组的线图", x = "Xfig", y = "Y轴", color = "组别")

ggplot(data, aes(x = x, y = y, group = group)) +
  geom_line(aes(color = group), na.rm = TRUE) +
  geom_point(aes(color = group), na.rm = TRUE) +
  labs(title = "基于分组的线图", x = "X轴", y = "Y轴", color = "组别")