[R] Using ggplot2 to plot percentages in bar chart.

[John Kane]

Well personally I would not have a clue on how to approach the problem but have a look at http://stackoverflow.com/questions/6644997/showing-data-values-on-stacked-bar-chart-in-ggplot2. which seems to do what you want only using geom_text()

Best of luck.
   





 

    On Monday, December 5, 2016 5:56 PM, Shawn Way <SWay at meco.com> wrote:
 

 #yiv4374957155 #yiv4374957155 -- _filtered #yiv4374957155 {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered #yiv4374957155 {font-family:SimSun;panose-1:2 1 6 0 3 1 1 1 1 1;} _filtered #yiv4374957155 {panose-1:2 4 5 3 5 4 6 3 2 4;} _filtered #yiv4374957155 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;} _filtered #yiv4374957155 {panose-1:2 1 6 0 3 1 1 1 1 1;}#yiv4374957155 #yiv4374957155 p.yiv4374957155MsoNormal, #yiv4374957155 li.yiv4374957155MsoNormal, #yiv4374957155 div.yiv4374957155MsoNormal {margin:0in;margin-bottom:.0001pt;font-size:12.0pt;}#yiv4374957155 a:link, #yiv4374957155 span.yiv4374957155MsoHyperlink {color:blue;text-decoration:underline;}#yiv4374957155 a:visited, #yiv4374957155 span.yiv4374957155MsoHyperlinkFollowed {color:purple;text-decoration:underline;}#yiv4374957155 span.yiv4374957155EmailStyle17 {color:#1F497D;}#yiv4374957155 .yiv4374957155MsoChpDefault {font-size:10.0pt;} _filtered #yiv4374957155 {margin:1.0in 1.0in 1.0in 1.0in;}#yiv4374957155 div.yiv4374957155WordSection1 {}#yiv4374957155 That’s precisely what I’m trying to accomplish.    Shawn Way, PE    From: John Kane [mailto:jrkrideau at yahoo.ca]
Sent: Monday, December 05, 2016 4:47 PM
To: Shawn Way <SWay at meco.com>; r-help at r-project.org
Subject: Re: [R] Using ggplot2 to plot percentages in bar chart.    I've never seen   stat_bin used like that. What exactly is it supposed to do. It looks like you are trying to label the %ages in each piece of the bar.    On Monday, December 5, 2016 2:17 PM, Shawn Way <SWay at meco.com> wrote:    I have the following data in which I'm trying to summarize in a stacked bar plot showing the percentages as a label in the bar.

The data is as follows:

> head(data)
  MASTERPAK2LT MASTERPAK4LT MASTERPAK7LT MASTERPAK10LT MASTERPAK22LT
1            X            X            X            X            X
2            C            C            C            X            X
3            C            C            C            X            X
4            U            U            X            X            X
5        <NA>            U            X            X            X
6        <NA>        <NA>            X          <NA>          <NA>

It is then transformed using dplyer:

> d2 <- data %>%
    gather(Model,Status) %>%
    group_by(Model,Status) %>%
    summarise(count=n()) %>%
    mutate(perc=count/sum(count))

giving 
> head (d2)
Source: local data frame [6 x 4]
Groups: Model [2]

          Model Status count      perc
          <chr>  <chr> <int>      <dbl>
1 MASTERPAK10LT      C    8 0.21052632
2 MASTERPAK10LT      X    29 0.76315789
3 MASTERPAK10LT  <NA>    1 0.02631579
4 MASTERPAK22LT      C    6 0.15789474
5 MASTERPAK22LT      U    1 0.02631579
6 MASTERPAK22LT      X    30 0.78947368

I then try to plot this using ggplot using 

plt <- ggplot(d2,aes(x=Model,y= perc,fill=Status)) +
    geom_bar(stat="identity") +
    labs(y="Percent Complete") +
    stat_bin(geom = "text",
            aes(label=paste(round(perc*100),"%")),
            vjust=5) +
    scale_y_continuous(labels = percent)

but I get the error:

Error: stat_bin() must not be used with a y aesthetic.

When I leave out the stat_bin, I get the correct bar chart, but without the labels.  Can someone please help me understand what is causing the error above?


Thank you kindly,

Shawn Way, PE

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