[R] Using sub to get captions in barplots

All, I've been using sub (subtitle) instead of main such that captions are below figures produced by xyplot. This works fine and captions are on a single line. However, when I try this for bar plots with error bars (altering the error.bars function form Crawley's The R Book, see below), the

Re: [R] Using sub to get captions in barplots

I've been using sub (subtitle) instead of main such that captions are below figures produced by xyplot. This works fine and captions are on a single line. However, when I try this for bar plots with error bars (altering the error.bars function form Crawley's The R Book, see below), the