使用ggplot2构建折线图 [英] Constructing a line graph using ggplot2

查看:277
本文介绍了使用ggplot2构建折线图的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我需要绘制三条线(在一张图上),每条线代表一个实验室团队的数据(两个变量/团队)。理想情况下,该图应该看起来美观(因此使用ggplot2!),但它的形式与以下所示的线形相似。我不明白如何使用gggplot2库将多行绘制到单个图上。我目前对ggplot2库的知识/技能很低,但我已在下面列入了我的雏鸟工作。



http://www.harding .edu / fmccown / r /#linecharts



编辑:每行由两个向量组成,如下所示:

  temp = c(4,25,50,85,100)
酶活性= c(0.543,0.788,0.990,0.898,0.882)

,x轴上的临时变量和每行都有不同的颜色,因此可以区分它们。 b

编辑2:

$ $ $ $ $ $ c $ amyA = c(0.091,0.147,0.202,0.236 ,0.074)
temp = c(4,23,37,65,100)
df = data.frame(temp,amyA)

ggplot(df,aes(x = temp,y = amyA,col ='blue'))+ geom_line()

第二次编辑不会生成蓝线,图例完全错误。如果我重复使用不同数据的两个ggplot调用,则只绘制一行。

解决方案

关键是要整理数据在绘图之前,在数据框中有一个因子列,表示每组 x , y 值。例如:

  set.seed(1)
df1 < - data.frame(e1 = sort(runif (5,0.05,0.25)),
e2 = sort(runif(5,0.05,0.25)),
e3 = sort(runif(5,0.05,0.25)),
t1 = sort(runif(5,1,100)),
t2 = sort(runif(5,1,100)),
t3 = sort(runif(5,1,100))

###重新设计它以给出一个指示组
df2 < - 的列,其中(df1,
as.data.frame(cbind(c(t1,t2,t3) ,
c(e1,e2,e3),
rep(seq(3),each = 5))
colnames(df2)< -c(temp ,活动,团队)
df2 $团队< - as.factor(df2 $ team)



$ p

$ p $ library $ ggplot
ggplot(df2,aes(x = temp, y = activity,col = team))+ geom_line()

给出:


I need to plot three lines (onto a single graph) each of which represents one lab team's data (two variables / team). Ideally, the graph should look aesthetically pleasing (hence the use of ggplot2!) yet similar in form to the line graphs shown below. I don't understand how to plot multiple lines onto a single graph using the gggplot2 library. My current knowledge of / skill with the ggplot2 library is low but I have included my fledgling efforts below.

http://www.harding.edu/fmccown/r/#linecharts

Edit: Each line is constructed from two vectors that look like this:

temp = c(4, 25, 50, 85, 100) 
enzyme_activity = c(0.543, 0.788, 0.990, 0.898, 0.882) 

with the temp variable on the x-axis and each line a different color so they can be differentiated.

Edit2:

amyA = c(0.091, 0.147, 0.202, 0.236, 0.074)
temp = c(4, 23, 37, 65, 100)
df = data.frame(temp, amyA)

ggplot(df, aes(x = temp, y = amyA, col = 'blue')) + geom_line()

The code within the second edit does not generate a blue line and the legend is completely wrong. If I repeat the two ggplot calls with differing data, only one line is plotted.

解决方案

The key thing is to organize your data before plotting so as to have a factor column in the data frame indicating a separate line for each set of x, y values. For example:

set.seed(1)
df1 <- data.frame(e1 = sort(runif(5, 0.05, 0.25)),
                  e2 = sort(runif(5, 0.05, 0.25)),
                  e3 = sort(runif(5, 0.05, 0.25)),
                  t1 = sort(runif(5, 1, 100)),
                  t2 = sort(runif(5, 1, 100)),
                  t3 = sort(runif(5, 1, 100))
                  )
### reshape this to give a column indicating group
df2 <- with(df1,
        as.data.frame(cbind( c(t1, t2, t3),
                            c(e1, e2, e3),
                            rep(seq(3), each=5) )
                      ))
colnames(df2) <- c("temp","activity","team")
df2$team <- as.factor(df2$team)

Then

library(ggplot2)
ggplot(df2, aes(x=temp, y=activity, col=team)) + geom_line()

giving:

这篇关于使用ggplot2构建折线图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!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆