[R] improving barplot output

[Bob Green]

Hello,

I was hoping for some advice on improving a barplot. Below is the syntax I 
have used. I wanted to do two things differently How would I alter the 
syntax so that (a) the y-axis finishes at 25 and not 20, and (b) 'past 
ideation' and 'pastwk ideation' are coloured blue and 'past attempt' & 
'past wk attempt' are coloured red ?

I was also curious as to whether it is possible to insert values into the 
respective bars?

>summarizedData = c(24,4,7,1.9)
>theNames = c("Past ideation","Past attempt", "Pastwk idea","Past wk attempt")
>names(summarizedData) = theNames
>barplot(summarizedData, ylab = "percentage", col="dark red")

Any assistance is appreciated,

regards

Bob Green