在ggplot中绘制多条线 [英] plot multiple lines in ggplot

问题描述

我需要使用ggplot绘制不同日期的每小时数据，这是我的数据集:

I need to plot hourly data for different days using ggplot, and here is my dataset:

数据包括每小时的观测值，我想将每天的观测值绘制到单独的一行中.

The data consists of hourly observations, and I want to plot each day's observation into one separate line.

这是我的代码

xbj1 = bj[c(1:24),c(1,6)]

xbj2 = bj [c(24:47)，c(1,6)] xbj3 = bj [c(48:71)，c(1,6)]

ggplot()+
geom_line(data = xbj1,aes(x = Date, y= Value), colour="blue") +
geom_line(data = xbj2,aes(x = Date, y= Value), colour = "grey") + 
geom_line(data = xbj3,aes(x = Date, y= Value), colour = "green") +
xlab('Hour') +
ylab('PM2.5')

请对此提供建议.

推荐答案

我会先制作一些假数据(我不会尝试抄录您的数据)

I'll make some fake data (I won't try to transcribe yours) first:

set.seed(2)
x <- data.frame(
  Date = rep(Sys.Date() + 0:1, each = 24),
  # Year, Month, Day ... are not used here
  Hour = rep(0:23, times = 2),
  Value = sample(1e2, size = 48, replace = TRUE)
)

这是直接的 ggplot2 图:

library(ggplot2)
ggplot(x) +
  geom_line(aes(Hour, Value, color = as.factor(Date))) +
  scale_color_discrete(name = "Date")

ggplot(x) +
  geom_line(aes(Hour, Value)) +
  facet_grid(Date ~ .)

我强烈建议您找到有关 ggplot2 的良好教程，例如 http://www.cookbook-r.com/Graphs/.其他的也存在，很多都很好.

I highly recommend you find good tutorials for ggplot2, such as http://www.cookbook-r.com/Graphs/. Others exist, many quite good.

这篇关于在ggplot中绘制多条线的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！