我有ID = 1,2,3 ... year = 2007,2008,2009 ...的面板数据,并且系数foreign = 0,1和变量X.
我想创建一个时间序列图,其中x轴=年,y轴= X的值,用于比较每个因素随时间的平均(平均值)发展。由于有两个因素,因此应该有两条线,一条为实线,另一条为虚线。
我假设第一步涉及每年的均值和X因子的计算,即在面板设置中。第二步应如下所示:
ggplot(data, aes(x=year, y=MEAN(X), group=Foreign, linetype=Foreign))+geom_line()+theme_bw()
多谢。
使用dplyr
计算方式:
library(dplyr)
# generate some data (because you didn't provide any, or any way or generating it...)
data = data.frame(ID = 1:200,
year = rep(1951:2000, each = 4),
foreign = rep(c(0, 1), 100),
x = rnorm(200))
# For each year, and seperately for foreign or not, calculate mean x.
data.means <- data %>%
group_by(year, foreign) %>%
summarize(xmean = mean(x))
# plot. You don't need group = foreign
ggplot(data.means, aes(x = year, y = xmean, linetype = factor(foreign))) +
geom_line() +
theme_bw()
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