我正在尝试绘制李克特量表数据发散堆积条形图 with ggplot2
.
我见过很多解决方案,其中我发现最好的一个是这个多方面的解决方案 https://stackoverflow.com/questions/51201852/faceted-horizontal-divergent-stacked-bar-plot-including-negative-values-using-dp(虽然不需要方面)。我特别欣赏这样一个事实:对于奇数刻度,中性值以 0 为中心。
我重现了这个想法(使用两个geom_col()
具有相反的计数)在此以简化的方式解决该解决方案:
# Data sample
data <-
tibble(
question = c("A", "A", "A", "A", "A", "B", "B", "B", "B", "B"),
option = c("Very bad", "Bad", "Neutral", "Good", "Exc",
"Very bad", "Bad", "Neutral", "Good", "Exc"),
count = c(1, 10, 4, 5, 3, 3, 4, 5, 6, 8)
) %>%
mutate(
option = option %>% factor(levels = c("Very bad", "Bad", "Neutral", "Good", "Exc")),
count = if_else(option == "Neutral", count/2, count)
)
# Divergent stacked bar chart
data %>%
ggplot(aes(question, count, fill = option)) +
geom_col(data = filter(data, option %in% c("Neutral", "Good", "Exc")),
position = position_stack(reverse = T)) +
geom_col(data = filter(data, option %in% c("Neutral", "Bad", "Very bad")),
aes(y = -count)) +
scale_fill_brewer(palette = "RdBu") +
coord_flip()
给出以下结果:
正如您所看到的,绘图的顺序是正确的,但图例和着色似乎忘记了因子排序(添加ordered = T
这个因素没有帮助)。
如果我删除第二个geom_col()
,那么一切都很好,但这显然不是我的目标。
我怎样才能强迫ggplot2
维持图例中的因子排序?