geom_bar position="dodge" does not dodge

[Julius]

Hi everyone,

I posted this in another forum but I cannot get the answers or results that I wanted. I have a dataframe:

p3 <- structure(list(test = c(1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,4,4,5,5,5,5,5),
result = c(26.88,24.53,24.02,20.33,22.01,19.84, 19.69,19.84,19.24,19.24,34.36,33.28,33.82,33.82,32.47,25.55,26.90,25.40,24.20,25.85,25.70,24.95,18.65,18.65,17.80,18.65,18.31)
), .Names = c("test", "result"), row.names = c(NA, -27L), class = "data.frame")

I wanted to make a 'dodged' barplot with 'test' in the x-axis and 'result' in the y-axis using the following:

ggplot(p3, aes(x = test, y = result))+ geom_bar(position="dodge", stat="identity")

Somehow I could not make it work. I have been using this code before but ever since I upgraded to the latest ggplot2 package, it was not behaving well. Can someone help me to fix this?


Cheers,

[Kohske Takahashi]

Hi

It looks working well.
What kinds of result do you expect?
Could you provide a sample figure?

2012/6/15 Julius <jute...@yahoo.com>:

> ggplot(p3, aes(x = test, y = result))+ geom_bar(position="dodge",
> stat="identity")

--
Kohske Takahashi <takahash...@gmail.com>

Assistant Professor,
Research Center for Advanced Science and Technology,
The University of  Tokyo, Japan.
http://www.fennel.rcast.u-tokyo.ac.jp/profilee_ktakahashi.html

[Dennis Murphy]

Hi:

Were you looking for something like this?

p3$test <- factor(p3$test)
p3$fac <- factor(unlist(sapply(as.vector(table(p3$test)), seq_len)))

ggplot(p3, aes(x = test, y = result, fill = fac)) +
geom_bar(position = 'dodge', stat = 'identity')

If you want to dodge a factor, you need to tell ggplot2 which factor to dodge :)

HTH,
Dennis

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[Julius Tesoro]

This works! Thank you. The following code shows what I really wanted. But how do I make all the colors similar to the fill(darkgreen)?
ggplot(p3, aes(x = test, y = result, color = fac)) + geom_bar(position = 'dodge', stat = 'identity', fill = 'darkgreen')

[Brandon Hurr]

What do you mean by "similar"? 

You could use the green palette in scale_brewer, but the lighter end is very white. If you want dark colors you can choose from lots. Baptiste made a couple of really good posts on colors in ggplot2 on the ggplot2 blog. 

http://blog.ggplot2.org/post/24607351280/choosing-colour-palettes-part-ii-educated-choices

#Greens
ggplot(p3, aes(x = test, y = result, fill = fac)) + geom_bar(position = 'dodge', stat = 'identity')+scale_fill_brewer(palette="Greens")

#dark2 palette
ggplot(p3, aes(x = test, y = result, fill = fac)) + geom_bar(position = 'dodge', stat = 'identity')+scale_fill_brewer(palette="Dark2")

HTH

On Fri, Jun 15, 2012 at 8:33 AM, Julius Tesoro <jute...@yahoo.com> wrote:

This works! Thank you. The following code shows what I really wanted. But how do I make all the colors similar to the fill(darkgreen)?
ggplot(p3, aes(x = test, y = result, color = fac)) + geom_bar(position = 'dodge', stat = 'identity', fill = 'darkgreen')

--