[R] how to convert character string with only month and year into date

[Gabor Grothendieck]

Try this:

> library(zoo) # as.yearmon
>
> as.yearmon("03_1993", "%m_%Y")
[1] "Mar 1993"
> as.Date(as.yearmon("03_1993", "%m_%Y"))
[1] "1993-03-01"

On Tue, Sep 22, 2009 at 3:03 PM, Sean Zhang <seanecon at gmail.com> wrote:
> Dear R helpers.
>
> I am new to plotting time data using R.
> wonder how to convert character time info into date in R.
> I searched over the web but did not find answer.
>
> the input character string is something like 03_1993 or 03-1993, so the
> precision is at month level.  I tried the following but failed.
> #R code below.
>
>  strptime(c("03_1993"),"%m_%Y")
> strptime(c("03-1993"),"%m-%Y")
>
> Can you someone kindly show me to do it?
>
> Many thanks in advance!
>
> -Sean
>
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>
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