Dear Greg,
thank you again for your help.
The graph looks much better now. However, I need the bars to be assigned to
the left y-axis, and the lines should be assigned to the right y-axis (the
y-axes have different ranges,e.g. left y-axis 0-20, and right y-axis 0-1).
Also would be nice if the bars had contour lines (more like the barplot)...
would that be possible?
Thank you so much again.
Anne-Katrin
--------------------------------------------------------------------------------------------------------
Barplot is probably not the best way here (it is possible, but more work
than it is worth). Here is one approach that gives
something similar to what you want: plot(x, y, lend=1,
lwd=25, ylim=c(-1,10), xlim=c(0.75,5.25),type='h',
col='grey')
lines(x, y2) Is that good enough? or do you need the bars
to look much more like the barplot?
From: Anne-Katrin Link [mailto:anne.link@gmx.de]
Sent: Sat 4/12/2008 7:11 AM
To: Greg Snow
Cc: r-help@r-project.org
Subject: RE: [R] two graphs in one figure?
Dear Greg, dear all,
thank you for your reply!
To clarify, here is an example of what I want to do (but better, of
course!):
x<- c(1,2,3,4,5)
y<- 0:4
y2<- c(0,0,7,8,9)
barplot(y ,ylim=c(-1,10), ylab="", xaxt="n",yaxt="n", main="")
axis(4,at=c(1,2,3,4,5,6))
text(6,2.9, "2nd y-axis", srt = 270, xpd = TRUE)
par(new=TRUE)
plot(x, y2, lty=2,type="l", xlab="x-axis", ylab= "y-axis")
I dont think "barplot" is the right thing to use here since I cant specify
the x-values....what can I do to make this graph look better?
Regards,
Anne-Katrin
Using par(new=TRUE) can be tricky.
A better approach is to create one plot, then add the other information
to it. You can add bars to an existing graph using barplot with
add=TRUE, you can add lines to an existing plot using the lines function.
If you give more detail of what you want (examples of x,
y, and ynew) then we may be able to give more help.
From: r-help-bounces@r-project.org on behalf of Anne-Katrin Link
Sent: Thu 4/10/2008 7:18 AM
To: R Help
Subject: [R] two graphs in one figure?
Dear all,
how can I plot a line graph and a bar graph in one single figure? I tried
to combine "barplot" and "plot". Even though they both have the same
x-values (1 to 55), it just doesnt look as if they match in their scale
(the barplot is much wider than the "plot"....even though I tried to put
limits on the x-axis).
Here is an example of what I did:
barplot(y, xaxt="n",yaxt="n",ylim=c(-1,45), xlim=c(1,55))
...
par(new=TRUE)
plot(x, ynew, lty=2, type="l", ylim=c(0,15), xlim=c(1,55))
Another question: how can I make sure that the "0"-values from the
barchart
are displayed as well?
Thank you so much!
Anne-Katrin
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