[英]How to round percentage to 2 decimal places in ggplot2
My code produces this graph:我的代码生成此图:
Code:代码:
ggplot(areas, aes(x = RETAILER, y = Difference), label=sprintf("%0.2f", round(areas$Difference, digits = 2))) +
geom_bar(stat = "identity", aes(fill = RETAILER), colour = "black") +
scale_y_continuous("Percentage", labels = percent_format()) +
geom_text(aes(label = paste(Difference * 100, "%"),
vjust = ifelse(Difference >= 0, -1.5, 1.5))) +
theme_classic()
I have found code to allow the data labels to be positioned correctly above or below each bar, but I cannot seem to get the values to round to 2 decimal places.我找到了允许将数据标签正确定位在每个条形上方或下方的代码,但我似乎无法将值四舍五入到小数点后两位。
I have tried round(areas, 2)
and sprintf("%0.2f")
among other things, but nothing I try seems to work and I'm sure that I'm missing something simple.我已经尝试过
round(areas, 2)
和sprintf("%0.2f")
等等,但我尝试的任何东西似乎都不起作用,而且我确信我错过了一些简单的东西。
Where am I going wrong?我哪里错了?
UPDATE:更新:
With Roland's "encouragement", I have now managed to almost resolve this;在罗兰的“鼓励”下,我现在几乎解决了这个问题; the problem now is that I have now lost the percentage signs:
现在的问题是我现在丢失了百分比符号:
How do I get them back?我如何让他们回来?
Updated code:更新代码:
ggplot(areas, aes(x = RETAILER, y = Difference)) +
geom_bar(stat = "identity", aes(fill = RETAILER), colour = "black") +
scale_y_continuous("Percentage", labels = percent_format()) +
geom_text(aes(label = sprintf("%0.2f", areas$Difference * 100, "%"),
vjust = ifelse(Difference >= 0, -1.5, 1.5))) +
theme_classic()
Recent versions of ggplot2/scales
packages offer arguments to the scales::percent
function, for instance to round percentages to integers: ggplot2/scales
包的最新版本为scales::percent
函数提供了参数,例如将百分比四舍五入为整数:
scale_y_continuous(labels = scales::percent_format(accuracy = 1L))
This is roughly equivalent to round(x, 0L)
: Note the 1
instead of 0
.这大致相当于
round(x, 0L)
:注意1
而不是0
。
Or for two digits:或两位数:
scale_y_continuous(labels = scales::percent_format(accuracy = 3L))
There is a near-duplicate question.有一个几乎重复的问题。 Check Henrik's answer here: How to prevent scales::percent from adding decimal
在此处检查 Henrik 的答案: 如何防止 scales::percent 增加小数
geom_text(label=percent(Difference,.11))
aes(label=paste(round(Difference*100,digits= 2),"%",sep=""))
I use the percent
function from formattable
within geom_text
.我用的是
percent
函数从formattable
内geom_text
。 So in your case I would do like so:所以在你的情况下,我会这样做:
geom_text(aes(label = formattable::percent(Difference)),
vjust = ifelse(Difference >= 0, -1.5, 1.5))
you can define digits
within percent
, but the default is 2, which is what you're looking for.您可以在
percent
内定义digits
,但默认值为 2,这正是您要查找的。 The % symbols remains, like you desire. % 符号保留,如您所愿。 Plus, you can do stuff with it as it is still
numeric
underneath and not character
like other solutions out there.另外,你可以用它做一些事情,因为它下面仍然是
numeric
,而不是像其他解决方案那样的character
。
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