时间表的最佳技术 [英] Best technique for timelines

问题描述

现在，卡扎菲40多年的统治时代已经结束，我想建立一个时间表，说明他与该时代其他国家的执政时期.例如美国总统，德国总理等 因此，x轴为时间，y轴为国家，时间轴按正确的时间范围划分-显示美国的尼克松，福特等

Now that Gaddafi's 40+ years rule has ended, I want to construct a timeline graph of his period in power with those of other countries over the era. e.g US presidents, German chancellors etc So the x axis would be time, the y axis countries and the timeline split - by the correct time frame - showing Nixon, Ford etc for the US

在尝试学习R时，我更喜欢用该语言的解决方案，但感觉这不是最好的解决方案.有什么建议或其他免费解决方案吗?

As I am trying to learn R, I would prefer a solution in that language but have a feeling it is not the best solution. Any suggestions for that or alternative, free solutions?

我可能应该补充一点，如果在R中数据帧将开始

I should probably add that if in R the dataframe would start

Country  Boss   TookCharge

USA      Nixon   1969-01-20
USA      Ford    1974-08-09
Germany  Brandt  1969-10-22
Germany  Schmidt 1974-05-16

推荐答案

这是ggplot的简单任务:

创建一些数据:

x <- data.frame(
    country = rep(c("USA", "Germany"), each=2),
    boss = c("Nixon", "Ford", "Brandt", "Schmidt"),
    start = as.Date(c("1969-01-20", "1974-08-09", "1969-10-22", "1974-05-16"))
)

绘制情节:

library(ggplot2)
ggplot(x, aes(x=start, y=country)) + 
    geom_line() + 
    geom_point() + 
    geom_text(aes(label=boss), hjust=0, vjust=0) +
    xlim(c(min(x$start), max(x$start)+5*365)) # Add some space to right

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