利用R中的ggplot2绘制变量随时间的变化曲线

install.packages("ggplot2")

library(ggplot2)

# 导入数据
data <- read.csv("data.csv")

# 转换时间列为日期格式
data$时间 <- as.Date(data$时间, format = "%Y-%m-%d")

# 绘制变量随时间的变化曲线
ggplot(data, aes(x = 时间, y = 变量)) +
  geom_line() +
  labs(x = "时间", y = "变量") +
  theme_minimal()

# 添加标题
ggplot(data, aes(x = 时间, y = 变量)) +
  geom_line() +
  labs(x = "时间", y = "变量", title = "变量随时间的变化曲线") +
  theme_minimal()

# 调整颜色
ggplot(data, aes(x = 时间, y = 变量)) +
  geom_line(color = "blue") +
  labs(x = "时间", y = "变量") +
  theme_minimal()

# 添加图例
ggplot(data, aes(x = 时间, y = 变量, color = "变量")) +
  geom_line() +
  labs(x = "时间", y = "变量") +
  theme_minimal() +
  scale_color_manual(values = c("blue"), labels = c("变量"))