Hello, R-help,
Although this is my first post to the mailing list, I have been a
subscriber for a while now, and have found all of the posts to be very
informative in my quest to attempt to master R. Thank you for that in
advance.
This question involves the use of the par() variables pin, oma, and mar to
resize "sub-plots" in an output window. I am aware from ?plot that the use
of these variables is hard to predict due to trying to change the same
underlying variables in different ways and that "those last in the
alphabet will win." However, I would still like to accomplish my goal
I am trying to but two line graphs in a column stacked vertically. The
lower graph will be much wider due to a greater dispersion of the data.
The upper graph will be much smaller, as the data ranges from, say, 1 to
-1. Therefore, I would like the graphs to be larger and smaller in height,
respectively. I attempt to do this with the pin variable of the par()
class.
Further, as the two graphs are related, I want to put a small or even no
margin between the two graphs. I manipulate the mar and oma variables to
this end.
Sadly, I am not getting the results that I want.
> par(mfcol=c(2,1)) # 2 plot window
> par(mar=c(0,4,0,2), oma=c(0,2,0.5,2), pin=c(6,0.5)) # Set all variables
at once for the upper plot
> plot(1:9) # sample upper plot
> par(pin=c(6,3)) # set window size for 2nd plot
> plot(1:9) # sample lower plot
This method produces the two box plots of varying heights, but does not
change the margins.
vs.
> par(mfcol=c(2,1)) # 2 plot window
> par(pin=c(6,0.5)) # Set window size upper plot
> par(mar=c(0,4,0,2), oma=c(0,2,0.5,2))# Set margins
> plot(1:9) # Sample upper plot
> par(pin=c(6,3)) # Set window size lower plot
> plot(1:9) # Sample lower plot
On the other hand, this method changes the margins, but does not change
the size of the upper box (the lower box's size is changed).
Also, by placing the set window size for the upper plot command below the
other par() call creates results like the first method.
I think the trick is in calling par() and setting the variables in the
correct order. Or maybe this is simply impossible to do with par() and I
should look into using a different library. Any insight would be helpful.
Thank you for any help,
Chris Kemendo
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 2
minor 12.0
year 2010
month 10
day 15
svn rev 53317
language R
version.string R version 2.12.0 (2010-10-15)
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