有时，R geom_path行“关闭".如何保持它们“打开"? [英] R geom_path lines "closing", sometimes. How to keep them "open"?

问题描述

我正在用ggplot的geom_path()绘制一系列财务预测.

I'm plotting a series of financial projections with ggplot's geom_path().

ggplot(df,aes(year,pot,color=iRate)) + geom_path() +  theme(legend.position="none") + ylim(0,300000)

这就是我所拥有的.. [对不起，这是一个链接]

This is what I have..[sorry it's a link]

..其中两条路径碰到了右手边，即40年，但随后又回到了起点.一行没有.这不是轴显示限制的问题，也不是数据框中的流氓线的问题-如果我删除所有年份< 5发生同样的事情.

..two of the paths hit the right hand edge, year 40, but then nip back to their beginning. One line doesn't. This isn't a problem of axis-display limits, nor of a rogue line in the data frame - if I remove all years < 5 the same thing happens. It may be a just problem of overburdening the plotting device, but it is repeatable..

有些问题询问如何关闭" geom_path，但无法回答此问题.如何确保路径保持开放"状态?

There are questions asking how to 'close' a geom_path which don't answer this. How do I ensure the path stays 'open'?

inflation <- seq(1, 1.1, 0.02)
potGrowth <- seq(1.02, 1.1, 0.02)
div <- 10000
initcapital <- 100000
output <- numeric()
lifespan <- 40
delay <- 10
for(j in 1:length(inflation)){ 
    str <- rep(0,lifespan)
    for(i in delay:lifespan){ str[i] <- floor((inflation[j]^i)*div) }
    for(k in 1:length(potGrowth)){ 
        cap <- initcapital
        for(i in 1:lifespan){  
        cap <- cap-str[i]; cap <- cap*potGrowth[k] 
        output <-  append(output, floor(cap))
        }
    }
}
iLen <- length(inflation); gLen <- length(potGrowth)
simulations <- iLen*gLen    
df <- data.frame(pot=output, projection=rep(1:simulations,each=lifespan), iRate=rep(inflation,each=lifespan*gLen), gRate=rep(rep(potGrowth,each=lifespan),times=iLen), year=rep(1:lifespan,times=simulations))

在这里可以通过插入group = projection

and here it is solved by inserting group=projection

ggplot(df，aes(year，pot，color = iRate，group = projection))+ geom_path()...

ggplot(df,aes(year,pot,color=iRate,group=projection)) + geom_path() ...

非问题图

推荐答案

感谢@aosmith在您的评论中提及参数group.这是一个可再现的示例，描述了空气质量数据集的路径关闭问题.假设您要绘制每个月各天的温度图表.保持所有月份在同一块图上(本着这些年度图的精神: arcticseaicenews ).

Thanks @aosmith for mentioning the argument group in your comment. Here is a reproducible example describing the path closing issue with the airquality dataset. Let's say you want to plot a chart of temperature along the days of each month. Keeping all months on the same plot (in the spirit of these yearly plots: arcticseaicenews).

单独使用geom_path()会导致上个月最后一天到下个月第一天之间令人讨厌的关闭"行.

Using geom_path() alone leads to annoying "closing" lines between the last day of the previous month and the first day of the next month.

library(ggplot2)
ggplot(airquality, aes(x = Day, y = Temp)) +
    geom_path()

在参数group=Month中使用geom_path()可以防止出现以下几行:

Using geom_path() with the argument group=Month prevents these lines from appearing:

ggplot(airquality, aes(x = Day, y = Temp, group=Month)) +
    geom_path()

当然，您还可以根据需要使用facet_wrap在不同的方面显示月份:

Of course you could also display months on different facets with facet_wrap depending on what you desire:

ggplot(airquality, aes(x = Day, y = Temp)) +
    geom_path() + 
    facet_wrap(~Month)

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