[R] Suming logical vectors

[Deepayan Sarkar]

Your IATmedian has some NAs (which are removed by sort) ?

On Thu, 18 Sep 2003, Murray Jorgensen wrote:

> Can anyone explain the following?  [R 1.6.0 Windows XP, yes I will
> upgrade soon.]
>
> Murray
>
>  > sort(IATmedian)[0:50]==0
>   [1]  TRUE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> FALSE
> [13] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> [25] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> [37] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> [49] FALSE FALSE
>  > sum(sort(IATmedian)[0:50]==0)
> [1] 2
>  > sum(sort(IATmedian)==0)
> [1] 2
>  > sum(IATmedian==0)
> [1] NA
>
> --
> Dr Murray Jorgensen      http://www.stats.waikato.ac.nz/Staff/maj.html
> Department of Statistics, University of Waikato, Hamilton, New Zealand
> Email: maj at waikato.ac.nz                                Fax 7 838 4155
> Phone  +64 7 838 4773 wk    +64 7 849 6486 home    Mobile 021 1395 862
>
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