[R] mean duration (persistence) of daily data

[Peter Ehlers]

I'm not sure what exactly you want, but maybe ?rle can help you.

   -Peter Ehlers


On 2010-06-20 15:52, Schmidt Martin wrote:
> Dear R users
>
> A quite simple question: how can I get the mean duration (persistence)
> of daily data, when the data set looks as follows:
>
> [1] 7 7 7 9 9 5 7 5 5 5 9 5 5 6 6 6 1 1 1 2 2 4 4 4 4 7 7 3 3 2 4 4 7 7
> 7 7 7
> [38] 7 7 5 5 9 9 5 5 5 1 7 9 9 9 9 9 5 5 5 5 5 3 4 4 4 4 4 4 4 4 2 2 2 2
> 2 2 8
> [75] 8 6 6 6 8 8 8 8 8 6 6 2 8 8 8 8 8 8 8 8 8 2 2 2 2 2 6 6 6 6 6 6 6 6
> 6 6 3
> [112] 3 2 2 2 1 5 1 1 4 2 2 2 2 2 2 2 3 4 4 4 3 3 3 6 6 6 8 8 4 4 2 4 4
> 1 1 6 6
> .............................and so on:
>
> Thus, I'd like to know, from each number (1-9) the mean duration from
> the first to the last day (here not visible, but each number stands for
> a day).
>
> With:
>
> length(which(test==1))
>
> I certainly get the total number of number 1......unfortunately that's
> all I got!
>
>
> Thanks for help
>