Is there a way to more directly facet by a continuous variable, in such a way that a line would continue across each of the facets? I specify "directly" because I realize this could be accomplished by creating a "category" variable, but is there a way to do this without such a categorical variable?
For example, for the 52 weeks of the year, create facets thusly:
First row: weeks 1-12
Second row: weeks 13-26