格式化ggplot2中的X轴上的日期 [英] Formatting dates on X axis in ggplot2
问题描述
我有一个非常非常艰难的时间让x轴看起来对我的图形来说是正确的。
以下是我的数据(通过 dput()
)生成:
df< - structure(list(Month = structure(1:12,.Label = c(2011-07-31,2011-08-31 ,2011-09-30,2011-10-31,2011-11-30,2011-12-31,2012-01-31,2012-02-29, 2012-03-31,2012-04-30,2012-05-31,2012-06-30),class =factor),AvgVisits = c(6.98655104580674,7.66045407330464,7.69761337479304,7.54387561322994 ,7.24483848458728,6.32001400498928,6.66794871794872,7.207780853854,7.60281201431308,6.70113837397123,6.57634103019538,6.75321935568936)),.Names = c(Month,AvgVisits),row.names = c(NA,-12L),class =data。框架)
下面是我试图绘制的图表:
ggplot(df,aes(x = Month,y = AvgVisits))+
geom_bar()+
theme_bw()+
labs(x =Month,y =每位用户的平均访问次数)
工作正常 - 但是,如果我想调整t的格式他约会,我相信我应该补充:
scale_x_date(labels = date_format(%m-%Y))
我试图让它的日期标签是'MMM-YYYY'
ggplot( df,aes(x = Month,y = AvgVisits))+
geom_bar()+
theme_bw()+
labs(x =Month,y =每用户平均访问量 )+
scale_x_date(labels = date_format(%m-%Y))
当我绘制该图,我继续得到这个错误:
stat_bin:binwidth默认为范围/ 30。使用'binwidth = x'来调整它。
尽管花了几个小时对 geom_line
和 geom_bar
,我无法修复它。任何人都可以解释我做错了什么?
编辑:作为后续想法:您可以使用date作为因子,还是应该使用 as.Date
在日期列上?
您可以使用date作为因子吗?
是的,但您可能不应该。
...还是应该在日期列上使用
as.Date
?
是的。
这导致我们这样做:
<$ c $ (df,aes(x = Month,y = AvgVisits))+
geom_bar(df,aes(x = Month,y = AvgVisits))
df $ Month < - as.Date(df $ Month)统计=身份)+
theme_bw()+
labs(x =Month,y =每个用户的平均访问量)+
scale_x_date(labels = date_format(%m - %Y))
stat =identity
c $ c>到您的 geom_bar
调用。
I'm having a very, very tough time getting the x-axis to look correct for my graphs.
Here is my data (generated via dput()
):
df <- structure(list(Month = structure(1:12, .Label = c("2011-07-31", "2011-08-31", "2011-09-30", "2011-10-31", "2011-11-30", "2011-12-31", "2012-01-31", "2012-02-29", "2012-03-31", "2012-04-30", "2012-05-31", "2012-06-30"), class = "factor"), AvgVisits = c(6.98655104580674,7.66045407330464, 7.69761337479304, 7.54387561322994, 7.24483848458728, 6.32001400498928, 6.66794871794872, 7.207780853854, 7.60281201431308, 6.70113837397123, 6.57634103019538, 6.75321935568936)), .Names = c("Month","AvgVisits"), row.names = c(NA, -12L), class = "data.frame")
Here is the chart I am trying to graph:
ggplot(df, aes(x = Month, y = AvgVisits)) +
geom_bar() +
theme_bw() +
labs(x = "Month", y = "Average Visits per User")
That chart works fine - but, if I want to adjust the formatting of the date, I believe I should add this:
scale_x_date(labels = date_format("%m-%Y"))
I'm trying to make it so the date labels are 'MMM-YYYY'
ggplot(df, aes(x = Month, y = AvgVisits)) +
geom_bar() +
theme_bw() +
labs(x = "Month", y = "Average Visits per User") +
scale_x_date(labels = date_format("%m-%Y"))
When I plot that, I continue to get this error:
stat_bin: binwidth defaulted to range/30. Use 'binwidth = x' to adjust this.
Despite hours of research on formatting of geom_line
and geom_bar
, I can't fix it. Can anyone explain what I'm doing wrong?
Edit: As a follow-up thought: Can you use date as a factor, or should you use as.Date
on a date column?
Can you use date as a factor?
Yes, but you probably shouldn't.
...or should you use
as.Date
on a date column?
Yes.
Which leads us to this:
library(scales)
df$Month <- as.Date(df$Month)
ggplot(df, aes(x = Month, y = AvgVisits)) +
geom_bar(stat = "identity") +
theme_bw() +
labs(x = "Month", y = "Average Visits per User") +
scale_x_date(labels = date_format("%m-%Y"))
in which I've added stat = "identity"
to your geom_bar
call.
In addition, the message about the binwidth wasn't an error. An error will actually say "Error" in it, and similarly a warning will always say "Warning" in it. Otherwise it's just a message.
这篇关于格式化ggplot2中的X轴上的日期的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!