R help - Jan 2013 - Changing mtext direction, or using text for the margin?

Hi all,

I have read through the archives, but can't find a solution to this problem.

I need the text direction on "dependent B", plotted in margin 4, to go
top to bottom (opposite what it is now). Here's some sample code:

#plot with mtext example

par(mgp = c(2,1,0), mfrow=c(2,2), las=1, mar=c(2,2,2,2), omi= 
c(0.5,0.2,0,0.2))

a<-1:10
b<-7:16
c<-21:30

plot(a~b, ylab="", xlab="", xaxt="n")
axis(1, at=b, labels=FALSE, tick=TRUE)
plot(c~b, ylab="", xlab="", xaxt="n",
yaxt="n")
axis(1, at=b, labels=FALSE, tick=TRUE)
axis(4, at=c(22,24,26,28,30), labels=TRUE, tick=TRUE)
plot(a~b, ylab="")
plot(c~b, ylab="", yaxt="n")
axis(4, at=c(22,24,26,28,30), labels=TRUE, tick=TRUE)

mtext(side=1, "independent", outer=TRUE, line=1, padj=1)
mtext(side=2, "dependent A", las=0, outer=TRUE, line=0.25)
mtext(side=4, "dependent B", las=0, outer=TRUE, line=0.25)

I have seen an example in help where i can use text and (srt) to 
manipulate this with a single panel plot, but not for a multi-panel 
example. Any help would be greatly appreciated.

Cheers,

Mike

On 07.01.2013 07:00, Michael Rennie wrote:
>
> Hi all,
>
> I have read through the archives, but can't find a solution to this
> problem.
>
> I need the text direction on "dependent B", plotted in margin 4,
to go
> top to bottom (opposite what it is now). Here's some sample code:
>
> #plot with mtext example
>
> par(mgp = c(2,1,0), mfrow=c(2,2), las=1, mar=c(2,2,2,2), omi>
c(0.5,0.2,0,0.2))
>
> a<-1:10
> b<-7:16
> c<-21:30
>
> plot(a~b, ylab="", xlab="", xaxt="n")
> axis(1, at=b, labels=FALSE, tick=TRUE)
> plot(c~b, ylab="", xlab="", xaxt="n",
yaxt="n")
> axis(1, at=b, labels=FALSE, tick=TRUE)
> axis(4, at=c(22,24,26,28,30), labels=TRUE, tick=TRUE)
> plot(a~b, ylab="")
> plot(c~b, ylab="", yaxt="n")
> axis(4, at=c(22,24,26,28,30), labels=TRUE, tick=TRUE)
>
> mtext(side=1, "independent", outer=TRUE, line=1, padj=1)
> mtext(side=2, "dependent A", las=0, outer=TRUE, line=0.25)
> mtext(side=4, "dependent B", las=0, outer=TRUE, line=0.25)
>
> I have seen an example in help where i can use text and (srt) to
> manipulate this with a single panel plot, but not for a multi-panel
> example. Any help would be greatly appreciated.

You cannot do that with mtext, you rather need a dirty hack with text(), 
I believe.

Best,
Uwe Ligges


> Cheers,
>
> Mike
>
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