[R] Subset based on a date range

[Uwe Ligges]

On 19.05.2012 15:34, Allen wrote:
> Hello,
>
> Can someone help me on how to make a subset of my dataframe using two dates.
> This is what I have tried, but no data is being excluded in the new frame.
>
> six_months<-subset(Two_years, vdate>2011-01-01|vdate<2011-07-01)


Convert the *string* "2011-01-01" to a date format that corresponds to 
vdate, see e.g. ?strptime.

Uwe ligges

> or all data is excluded
>
> six_months<-subset(Two_years, vdate>2011-01-01&vdate<2011-07-01)
>
>
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