R help - Mar 2012 - acf() plot of matrix cuts y-axis labels

Hello all,
I found a funny problem with y-axis labels when plotting acf(matrix) -
the labels are too close to one of the margins and cut in half.
Here's the problem:

test<-matrix(rnorm(200),ncol=4)
acf(test)

This doesn't fix the problem:
test<-matrix(rnorm(200),ncol=4)
par(mar=c(3,3,2,0.2),oma=c(0,0,0,0))
acf(test)

This does fix the margin. I understand why, but not sure why ONLY this
will work?
test<-matrix(rnorm(200),ncol=4)
acf(test,mar=c(3,3,2,0.2),oma=c(0,0,0,0))

______
Win xp sp3, 
> R.version.string
[1] "R version 2.14.1 (2011-12-22)"
> 

Thanks
Michael Folkes



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On 02/03/2012 11:40 AM, Folkes, Michael wrote:
> Hello all,
> I found a funny problem with y-axis labels when plotting acf(matrix) -
> the labels are too close to one of the margins and cut in half.
> Here's the problem:
>
> test<-matrix(rnorm(200),ncol=4)
> acf(test)
>
> This doesn't fix the problem:
> test<-matrix(rnorm(200),ncol=4)
> par(mar=c(3,3,2,0.2),oma=c(0,0,0,0))
> acf(test)
>
> This does fix the margin. I understand why, but not sure why ONLY this
> will work?
> test<-matrix(rnorm(200),ncol=4)
> acf(test,mar=c(3,3,2,0.2),oma=c(0,0,0,0))
acf uses plot.acf to do the plotting.  If you read ?plot.acf, you'll see 
how it comes up with acf settings:  the global ones are overridden for 
data like yours.

You might want to do some experimenting and suggest better defaults for 
plot.acf.

Duncan Murdoch