Hi Ana,

Check section 4 of http://www.jstatsoft.org/v40/i03/paper for more
alternatives.

HTH,
Jorge.-


On Mon, Dec 12, 2011 at 9:39 PM, Ana <> wrote:

> How do I sum 15 years to my dataset?
>
> original dataset
>         dates        val
> 1    2001-01-12    1.2
> 2    2001-02-12    1.2
> 3    2001-03-12    1.2
>
> result
>         dates        val
> 1 2016-01-12 1.2
> 2    2016-02-12 1.2
> 3    2016-03-12 1.2
>
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> and provide commented, minimal, self-contained, reproducible code.
>

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