Three questions about plotting
On 02/28/2014 11:19 AM, David Parkhurst wrote:
I would like to plot three graphs, one above the other, of three ?y? variables that have different scales against a common Date variable, as with the code below. Q1. If I understand correctly, I can't use lattice graphics because my y's have different scales. Is that correct? All the lattice or trellis plots I've seen have common ?y? scales for all plots. I have two problems with what this code produces: Q2. How can I get the vertical dimension of all three plots to be the same? I know that I've made them different by using different mar numbers, but I had to do that, I thought, to leave room for date axis labels. I don't want to leave wasted space between the plots.
You can get what you want with: layout(matrix(1:3,ncol=1),heights=c(1,1,1.4)) rather than mfrow. Also, try using: # first plot par(mar=c(0,4,4,4)) # second plot par(mar=c(0,4,0,4)) # and yaxt="n" ... axis(4) # third plot par(mar=c(4,4,0,4))
Q3. Why are my dates not coming out in the format I've specified in the axis.Date statement?
Try DateLbls<-format(seq.Date(...),format="%m-%y") Jim