[R] change y axis "distance"

[Gavin Simpson]

On Tue, 2010-09-21 at 03:55 -0700, Joel wrote:
> Hi
> 
> I got a barplot that has values between 0-150 and the y-axis shows the steps
> 0 50 100 and 150 but I would like to change it to 0 10 20 30... ...130 140
> 150
> 
> Dont really know the word in english so sry about it beeing abit confusing
> :)
> 
> Thx for your help 
> Joel

If you want to draw the ticks at specific locations rather than the ones
R chooses for you, turn off the axes in your plot call and then cook
your own axis using the axis() function.

Here's an example using dummy data:

set.seed(123)
mdat <- rpois(10, 10)
names(mdat) <- LETTERS[1:10]
barplot(mdat, axes = FALSE)
## label at 1, 2, 3 etc not 2, 4, 6, etc
axis(side = 2, at = seq(1, max(mdat), by  = 2))

For you specific axis call, try:

axis(side = 2, at = seq(0, 150, by = 10))

HTH

G
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