How can I create a histogram from aggregated data in R?

Question

I have a data frame that has a format like the following:

Month       Frequency
2007-08     2
2010-11     5
2011-01     43
2011-02     52
2011-03     31
2011         


        

Answer 1

take a gander at ggplot2.

if you data is in a data.frame called df:

ggplot(df,aes(x=Month,y=Frequency))+geom_bar(stat='identity')

or if you want continuous time:

df$Month<-as.POSIXct(paste(df$Month, '01', sep='-'),format='%Y-%m-%d')
ggplot(df,aes(x=Month,y=Frequency))+geom_bar(stat='identity')