绘图大小 - 在IPython Notebook中使用ggplot2（通过rmagic）

I have started integrating R usage into Notebook to get, from my perspective, the best of both worlds (data management in python while exploiting the comparative analytical/graphical advantages of R). Unfortunately I am hung up on a seemingly easy element, adjusting plot size for ggplot2 graphics. Adjusting plot sizes is pretty straightforward with pandas, and in a purely R environment (like RStudio), I can adjust plots with dev.new() or PNG(), etc. However, attempting to do this is Notebook makes my computer go nuts (I am running Ubuntu 13.04 on an ASUS U46E). Furthermore, this is crucial, I want to keep the graphics inline so that I can pass the script in its entirety to my colleagues.I have started integrating R usage into Noteboo