Hi all,
I have a large data frame and would like to make a barplot of a categorical
variable with the bars sorted in order of decreasing frequency.
# Example:
v1 = c(1.2, 1.4, 0.9, 1.0, 1.1, 1.0)
v2 = c("aa", "cc", "bb", "bb",
"cc", "bb")
v3 = c(8, 10, 11, 9, 9, 10)
df = data.frame(v1=v1, v2=v2, v3=v3)
# How can I tell ggplot to sort the bars?
# First bar = "bb" (3), second bar "cc" (2) and third bar
"aa" (1)
p = gplot(df)
p + aes(v2) + geom_bar()
Thank you,
Morten
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Hi Morten
Just order the factor the way you want before plotting:
df$v2 <- factor(df$v2, levels=c("bb", "cc",
"aa"))
p = ggplot(df)
p + aes(v2) + geom_bar()
Best,
Ista
On Wed, Oct 6, 2010 at 5:09 AM, Morten <Morten.Lindberg at siv.no>
wrote:>
> Hi all,
>
> I have a large data frame and would like to make a barplot of a categorical
> variable with the bars sorted in order of decreasing frequency.
>
> # Example:
> v1 = c(1.2, 1.4, 0.9, 1.0, 1.1, 1.0)
> v2 = c("aa", "cc", "bb", "bb",
"cc", "bb")
> v3 = c(8, 10, 11, 9, 9, 10)
> df = data.frame(v1=v1, v2=v2, v3=v3)
>
> # How can I tell ggplot to sort the bars?
> # First bar = "bb" (3), second bar "cc" (2) and third
bar "aa" (1)
>
> p = gplot(df)
> p + aes(v2) + geom_bar()
>
>
> Thank you,
>
> Morten
> --
> View this message in context:
http://r.789695.n4.nabble.com/ggplot2-barplot-in-decreasing-frequency-tp2964511p2964511.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org
Hi:
Another approach is:
v1 = c(1.2, 1.4, 0.9, 1.0, 1.1, 1.0)
v2 = c("aa", "cc", "bb", "bb",
"cc", "bb")
v3 = c(8, 10, 11, 9, 9, 10)
df = data.frame(v1=v1, v2=v2, v3=v3)
ggplot(df) + geom_bar(aes(x = reorder(v2, desc(v3))))
HTH,
Dennis
On Wed, Oct 6, 2010 at 2:09 AM, Morten <Morten.Lindberg@siv.no> wrote:
>
> Hi all,
>
> I have a large data frame and would like to make a barplot of a categorical
> variable with the bars sorted in order of decreasing frequency.
>
> # Example:
> v1 = c(1.2, 1.4, 0.9, 1.0, 1.1, 1.0)
> v2 = c("aa", "cc", "bb", "bb",
"cc", "bb")
> v3 = c(8, 10, 11, 9, 9, 10)
> df = data.frame(v1=v1, v2=v2, v3=v3)
>
> # How can I tell ggplot to sort the bars?
> # First bar = "bb" (3), second bar "cc" (2) and third
bar "aa" (1)
>
> p = gplot(df)
> p + aes(v2) + geom_bar()
>
>
> Thank you,
>
> Morten
> --
> View this message in context:
>
http://r.789695.n4.nabble.com/ggplot2-barplot-in-decreasing-frequency-tp2964511p2964511.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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