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-#+date: 2016-10-05 21:48:11 +0800
-#+title: Facet labels in R
-#+filetags: R graph code
+#+date: <2016-10-05 21:48:11 +0800>
+#+title: Facet labels in R.
+#+filetags: :R:graph:code:
 
 Getting used to the grammar of ggplot2 takes some time, but so far it's not been disappointing. Wanting to split a
 scatterplot by segment, I used =facet_grid=. That by default shows a