ggplot2意外的vapply错误 [英] ggplot2 unexpected vapply error

问题描述

让我们考虑以下示例:

library(ggplot2)

zzz <- data.frame(gp = c("a","b","c","d","e","f","g","h","i","j","k","l","m"), 
              c1 = c(1,1,1,1,1,1,1,1,1,1,1,1,1), 
              c2 = c(1,1,1,1,1,1,1,1,1,1,1,1,1))

ggplot(zzz, aes(x = c1, y = c2)) +
  facet_wrap(~ gp, scales = "free", strip.position = "bottom") +
  geom_point() +
  theme(
    aspect.ratio = 1,
    strip.background = element_blank(),
    strip.placement = "outside"
  )

为什么会出现以下错误?而我该如何克服呢?

Why do I get the following error? And how could I overcome it?

Error in vapply(row_axes, is.zero, logical(length(row_axes))) : 
values must be length 3,
but FUN(X[[1]]) result is length 1

我测试过的一些调整表明，在以下情况下没有问题:

Some tweaks I tested revealed that there is no issue if:

a)我删除了data.frame中的一行，或者如果我又添加了2行，每行又添加了一个新组，或者

a) I remove one line in the data.frame or if I add 2 more lines with a new group for each, or

b)我删除了strip.placement = "outside"或strip.position = "bottom"

那是个错误吗?我错过了什么?我想保留带状设置的美感...

Is that a bug? Did I miss something? I would like to keep the strip settings for aesthetics...

推荐答案

我不知道您的代码中的问题是什么，它在scales/strip.plavcement中.

I don't know what the problem was in your code, it's in scales/strip.plavcement.

此代码对我有用:

library(ggplot2)

zzz <- data.frame(gp = c("a","b","c","d","e","f","g","h","i","j","k","l","m"), 
                  c1 = c(1,1,1,1,1,1,1,1,1,1,1,1,1), 
                  c2 = c(1,1,1,1,1,1,1,1,1,1,1,1,1))
str(zzz)
zzz$c1=as.character(zzz$c1)
zzz$c2=as.character(zzz$c2)
ggplot(zzz, aes(x = c1, y = c2)) +geom_point() +
  # facet_wrap(~ gp, scales = "free", strip.position = "bottom") 
  facet_wrap(~gp,nrow=1,strip.position = "bottom")+
  theme(panel.background = element_blank(),
        strip.background = element_blank(),axis.text.x=element_blank())
  # theme(
  #   aspect.ratio = 1,
  #   strip.background = element_blank(),
  #   strip.placement = "outside")

输出为...希望此对

The output is this...hope this helps

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