[R] Help needed in double bar plot made using ggplot2

[bharat rawlley]

 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 using 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

Às 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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