[R] Plotting barplot and scatterplot on same device - x-axis problem

[Francisco J. Zagmutt]

You could try using the arguments type, lwd and lend in the call to 
plot().  For example:

plot(1:10, type="h", lend=2, lwd=10)
points((1:10)*1.1, type="b")

type="h" creates vertical lines under each observation, lwd controls the 
thickness of the lines, and lend=2 draws square ends on the lines.

I hope this helps,

Francisco




Thomas Pedersen wrote:
> Hi R-users
> 
> I'm a relative newbie and uses R mostly for graphical purpose. I have a
> layout problem when plotting a scatterplot and a barplot using
> par(new=TRUE). The baseline of the x-axis is not positioned equal for the
> two plotting functions (see picture) and I have been unable to find out how
> this is changed. 
> 
> http://www.nabble.com/file/p18025066/pic.jpeg 
> 
> I have added the script if this is of interrest:
> 
> par(mar = c(7, 4, 4, 2) + 0.1)
> 
> barplot(rbind(data$Asn,data$Glu,data$NH3),
>  beside=T,
>  axes=TRUE,
>  xlim=c(0,57),
>  ylim=c(0,10))
> 
> par(new=TRUE)
> 
> plot(1:14,data$Acidification.time,
>  axes=FALSE,
>  type="b",
>  xlab="",
>  ylab="",
>  xlim=c(0.3,14.7),
>  ylim=c(6,8))
> 
> axis(1,pos=6,
>  labels=FALSE,
>  at=c(0.3,1:14,14.7))
> 
> text(1:14, par("usr")[3], srt = 90, adj = 1,
>  labels = data$Month, xpd = TRUE)
> 
> axis(4,pos=14.7)
> 
> All help will be greatly appreciated