[R] zoo: variable gets modified at making zoo object

Gabor Grothendieck ggrothendieck at gmail.com
Mon May 28 18:11:55 CEST 2012


On Mon, May 28, 2012 at 5:35 AM, Agustin Lobo
<Agustin.Lobo at ictja.csic.es> wrote:
> I'm doing:
>
>> alyL32007z <- zoo(alyL32007,alyL32007$time)
>> range(time(alyL32007z))
> [1] "2007-01-01 00:00:00 UTC" "2007-12-31 23:30:00 UTC"
>
> But then, while the original variable is:
>> summary(alyL32007$NEE_st)
>   Min. 1st Qu.  Median    Mean 3rd Qu.    Max.    NA's
> -15.340  -1.615  -0.054  -0.814   0.750   8.965   11124
>
> the variable within the zoo object is different:
>> summary(alyL32007z$NEE_st)
>     Index                     alyL32007z$NEE_st
>  Min.   :2007-01-01 00:00:00     0.335:    7
>  1st Qu.:2007-04-02 05:52:30     0.582:    7
>  Median :2007-07-02 11:45:00     0.611:    7
>  Mean   :2007-07-02 11:45:00     0.063:    6
>  3rd Qu.:2007-10-01 17:37:30     0.069:    6
>  Max.   :2007-12-31 23:30:00   (Other): 6363
>                               NA's   :11124
>
> and I  get an error at plotting:
>> plot(alyL32007z$NEE_st)
> Error in plot.window(...) : invalid 'ylim' value
>
> Any help appreciated,
>
> Thanks
> Agus
> --
> Dr. Agustin Lobo
> Institut de Ciencies de la Terra "Jaume Almera" (CSIC)
> Lluis Sole Sabaris s/n
> 08028 Barcelona
> Spain
> Tel. 34 934095410
> Fax. 34 934110012
> e-mail Agustin.Lobo at ictja.csic.es
> https://sites.google.com/site/aloboaleu/
>
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Read the last two lines and particularly the part about posting
reproducible code.

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