how to draw this pic - common x axis

[Youhuang Bai]

Hi, all
I am a newer to ggplot2, with little experience in R.
How to draw this picture, two data on the same x axis.
Thanks.
Youhuang

[Brandon Hurr]

Can you provide an example data frame of this data in dput() format? 

I would guess you could do it using two layers of geom_bar and modifying your axis label with a lot of spaces (but this would be manual so you couldn't do it reproducibly unless your axes were always the same). 

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[Sylo Sam]

Hi group,

I have three columns - Continent as column V3, Tobacco consumption (Male) as column V72, and Tobacco consumption (Female) as column V73.

boxplot(food$V72 ~ food$V3) gives the continent wise box plot of Tobacco consumption (Male) and

boxplot(food$V73 ~ food$V3) gives the continent wise box plot of Tobacco consumption (Female).

But I want a box plot of continent wise Male Vs Female Tobacco consumption. If anybody know the code, pls help.

Thanks,

Sam

[Roman Luštrik]

Can you provide a reproducible example? Here are a few tips on how to do that:

http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example

Cheers,

Roman

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[Dennis Murphy]

1. This is a ggplot2 list, but the code you offered is from base graphics.
2. Reading deeply between the lines:

DF <- subset(food, select = c("V3", "V72", "V73")
names(DF) <- c("continent", "male", "female")

library(reshape2)
library(ggplot2)
DFm <- melt(DF, id.vars = "continent", variable.name = "gender")

# All on one plot
ggplot(DFm, aes(x = continent, y = value, fill = gender)) +
geom_boxplot(position = position_dodge(width = 0.8))

# Assuming continent is a factor, an alternative is
# to facet by continent:
ggplot(DFm, aes(x = gender, y = value)) +
geom_boxplot() +
facet_wrap(~ continent)

Untested in the absence of a reproducible example. Caveat emptor.

Dennis