[R] How can I fit the secondary y axis legend on my graph?

[Chris Grobler]

Dear All,

   Having a bit of trouble with plotting two y variables on the same 
graph. I cannot manage to get the secondary y axis label on to the right 
of the axis - it gets plotted beyond the graphic window I assume?! The 
way I constructed the graph is thus:

plot(data[,3],data[,2],axes=F, type="b")     ## plots my data from two 
data colums without axes - fine
axis(1, at=data[,3])                                     ## adds my 
primary axis - fine
mtext("Year", side=1, line=2)                     ## Adds the title 
"Year" - fine
axis(2)
mtext("Index of population size", side=2, line=2)    ## Puts the primary 
y axis on and names it correctly
points(data[,3],data[,1],pch=16)                 ## puts my secondary y 
points on - also fine
axis(4)
mtext("Number of sun hours in April", side=4, line=2) ## if I enter 
"line=1" it writes over my inex numbers but if I put                     
                                                                        
        "line=2" it disappears.

I assume that perhaps the graph automatically fills the space and does 
not leave any for 'odd' axes. My questions therefore are: how can I get 
the legend on that axis, how do I remove ylab and xlab to free the space 
that they take (as they spaced by default at "line=3" and thus waste 
space - I would like to set them to "line=2") and perhaps how do I 
scrunch up the x-axis so that it leaves more space at either side?

Sorry for the ignorance!

Chris