bharat rawlley
2021-Aug-19 20:35 UTC
[R] Help needed in double bar plot made using ggplot2
Thank you very much for the elaborate response, Dr. Barradas! It was extremely
helpful!?
This resolves all my queries except one; I am unable to assign aesthetic colors
in a way that the bar and text colors remain the same. I am not sure how to
exactly assign color outside of aes. I used the following code which made
everything red (and I want only text on top of the red bars to be red, rest to
be blue according to their bar colors)
ggplot(aes(x=year, y=percentage, group=gender, fill=gender), data =
graph_text)+? geom_bar(position = 'dodge', stat='identity')+?
theme_classic()+? geom_text(aes(label = percentage), size = 5, position =
position_dodge(width = 0.9), vjust=0, color = "Red") +??
scale_y_continuous(limits=c(0, 1.1*ymax))
Thank you very much for your time and help, Dr. Barradas!?
On Thursday, 19 August, 2021, 02:07:44 pm GMT-4, Rui Barradas
<ruipbarradas at sapo.pt> wrote:
Hello,
First, sample data.
set.seed(2021)
year <- rep(2016:2019, 2)
percentage <- runif(length(year), 0.25, 0.70)
gender <- rep(c("M", "F"), each = 4)
graph_text <- data.frame(year, percentage, gender)
1) You have expand = c(0,0). Like this there is no space above the
greatest bar. In order to make room, change to limits = c(0, ymax + 10
percent).
2) Make the width of the bars larger, position_dodge(width = 0.9)
3) Assign a aesthetic color in geom_text, if you want the bars and text
colors to be the same, assign a value outside aes() if you want only one
color for the text. See at the end.
4) Not asked but I use scales::percent to make the percentages
automatic. Change back to your code if not needed.
ymax <- max(graph_text$percentage)
ggplot(aes(x=year, y=percentage, group=gender, fill=gender), data =
graph_text)+
? geom_bar(position = 'dodge', stat='identity')+
? geom_text(
? ? aes(label = scales::percent(percentage, accuracy = 0.1), color =
gender),
? ? position = position_dodge(width = 0.9),
? ? size = 5,
? ? vjust = 0
? )+
? scale_y_continuous(
? ? limits = c(0, 1.1*ymax),
? ? labels = scales::percent
? )+
? theme_classic()
The following geom_text will change the text labels color to red.
? geom_text(
? ? aes(label = scales::percent(percentage, accuracy = 0.1)),
? ? position = position_dodge(width = 0.9),
? ? #
? ? color = "red",
? ? #
? ? size = 5,
? ? vjust = 0
? )
Hope this helps,
Rui Barradas
?s 17:52 de 19/08/21, bharat rawlley via R-help
escreveu:> Hello
> I have tried to create the following graph using ggplot2 using the
following code -
> ggplot(aes(x=year, y=percentage, group=gender, fill=gender), data =
graph_text)+? geom_bar(position = 'dodge', stat='identity')+?
scale_y_continuous(expand = c(0,0))+? theme_classic()+? geom_text(aes(label =
percentage), size = 5, position = position_dodge(width = 0.5), vjust=0)
>
>
> I wanted to ask
> 1) In the last plot why is the label on top not showing up even when I save
the image as a pdf?
> 2) Is there anyway to make the labels appear in the middle of the bar? It
is aligned to the left right now
> 3) Is there any way to change the colour of the labels on the top of the
bars?
> Thank you!
>
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> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
[[alternative HTML version deleted]]
Hello, Glad it helped. As for making everything red, that only happens with the 2nd geom_text I posted. And this is because color = "red" is not in aes(). In the 1st geom_text, I have aes( etc , color = gender) and this makes the color depend on gender. To make the text and bars colors the same, put color = gender in the initial call to ggplot. Like this, all geom_ (layers) will inherit that aesthetic. And you don't need group = gender, fill or color already group the data. ggplot(aes(x=year, y=percentage, fill=gender, color=gender), data = graph_text)+ rest_of_code Hope this helps, Rui Barradas ?s 21:35 de 19/08/21, bharat rawlley escreveu:> Thank you very much for the elaborate response, Dr. Barradas! It was > extremely helpful! > > This resolves all my queries except one; I am unable to assign aesthetic > colors in a way that the bar and text colors remain the same. I am not > sure how to exactly assign color outside of aes. I used the following > code which made everything red (and I want only text on top of the red > bars to be red, rest to be blue according to their bar colors) > > ggplot(aes(x=year, y=percentage, group=gender, fill=gender), data = > graph_text)+ > ? geom_bar(position = 'dodge', stat='identity')+ > ? theme_classic()+ > ? geom_text(aes(label = percentage), size = 5, position = > position_dodge(width = 0.9), vjust=0, color = "Red") + > ? scale_y_continuous(limits=c(0, 1.1*ymax)) > > Thank you very much for your time and help, Dr. Barradas! > > > On Thursday, 19 August, 2021, 02:07:44 pm GMT-4, Rui Barradas > <ruipbarradas at sapo.pt> wrote: > > > Hello, > > First, sample data. > > set.seed(2021) > year <- rep(2016:2019, 2) > percentage <- runif(length(year), 0.25, 0.70) > gender <- rep(c("M", "F"), each = 4) > graph_text <- data.frame(year, percentage, gender) > > > 1) You have expand = c(0,0). Like this there is no space above the > greatest bar. In order to make room, change to limits = c(0, ymax + 10 > percent). > > 2) Make the width of the bars larger, position_dodge(width = 0.9) > > 3) Assign a aesthetic color in geom_text, if you want the bars and text > colors to be the same, assign a value outside aes() if you want only one > color for the text. See at the end. > > 4) Not asked but I use scales::percent to make the percentages > automatic. Change back to your code if not needed. > > > > ymax <- max(graph_text$percentage) > > ggplot(aes(x=year, y=percentage, group=gender, fill=gender), data > graph_text)+ > ? geom_bar(position = 'dodge', stat='identity')+ > ? geom_text( > ? ? aes(label = scales::percent(percentage, accuracy = 0.1), color > gender), > ? ? position = position_dodge(width = 0.9), > ? ? size = 5, > ? ? vjust = 0 > ? )+ > ? scale_y_continuous( > ? ? limits = c(0, 1.1*ymax), > ? ? labels = scales::percent > ? )+ > ? theme_classic() > > > The following geom_text will change the text labels color to red. > > > ? geom_text( > ? ? aes(label = scales::percent(percentage, accuracy = 0.1)), > ? ? position = position_dodge(width = 0.9), > ? ? # > ? ? color = "red", > ? ? # > ? ? size = 5, > ? ? vjust = 0 > ? ) > > > > Hope this helps, > > Rui Barradas > > ?s 17:52 de 19/08/21, bharat rawlley via R-help escreveu: > > Hello > > I have tried to create the following graph using ggplot2 using the > following code - > > ggplot(aes(x=year, y=percentage, group=gender, fill=gender), data = > graph_text)+? geom_bar(position = 'dodge', stat='identity')+ > scale_y_continuous(expand = c(0,0))+? theme_classic()+ > geom_text(aes(label = percentage), size = 5, position = > position_dodge(width = 0.5), vjust=0) > > > > > > I wanted to ask > > 1) In the last plot why is the label on top not showing up even when > I save the image as a pdf? > > 2) Is there anyway to make the labels appear in the middle of the > bar? It is aligned to the left right now > > 3) Is there any way to change the colour of the labels on the top of > the bars? > > Thank you! > > > > > > > > > > > > > > > > > > > > > > > > > > > > ______________________________________________ > > R-help at r-project.org <mailto:R-help at r-project.org> mailing list -- To > UNSUBSCRIBE and more, see > > https://stat.ethz.ch/mailman/listinfo/r-help > <https://stat.ethz.ch/mailman/listinfo/r-help> > > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > <http://www.R-project.org/posting-guide.html> > > and provide commented, minimal, self-contained, reproducible code. > >