This is a perfect task for ts
in R base. Suppose your data.frame is x
then using ts
will produce the output you want.
> ts(x$count, start=c(2011,01,01), end=c(2011,12,01), frequency=12)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2011 10578 9330 10686 10260 10032 9762 10308 9966 10146 10218 8826 9504