"file","count"
"DDR-Yihui-Xie-Chap1-3.pdf",14977
"knitr-beamer.pdf",4343
"knitr-graphics.pdf",21614
"knitr-listings.pdf",906
"knitr-manual.pdf",39178
"knitr-minimal.pdf",12695
"knitr-subfloats.pdf",218
"knitr-themes.pdf",2883
"knitr-twocolumn.pdf",533