[R-sig-Geo] raster: cannot extract object from list

[Agustin Lobo]

Solved: it was caused by having upgraded to raster 1.8.40 but using
raster objects created under 1.8.38

Agus

2011/7/6 Agustin Lobo <alobolistas at gmail.com>:
> A function of mine outputs several raster objects in a list "l":
>> class(l$lisaobsv)
> [1] "RasterLayer"
> attr(,"package")
> [1] "raster"
>
> But by some reason I get this weird error:
>> a = l$lisaobsv
> Error in slot(x, slotname) :
>  no slot of name "z" for this object of class "RasterLayer"
> Calls: <Anonymous> -> lapply -> FUN -> slot -> .Call
> Warning message:
> In .rk.get.structure.global("a") : failure to get object a
>
> Is this a bug or is there an special way to extract raster objects from a list?
>
> Thanks
>
> Agus
>
>> sessionInfo()
> R version 2.13.0 (2011-04-13)
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> locale:
>  [1] LC_CTYPE=en_US.UTF-8          LC_NUMERIC=C
>  [3] LC_TIME=en_US.UTF-8           LC_COLLATE=en_US.UTF-8
>  [5] LC_MONETARY=en_US.UTF-8       LC_MESSAGES=en_US.UTF-8
>  [7] LC_PAPER=en_US.UTF-8          LC_NAME=en_US.UTF-8
>  [9] LC_ADDRESS=en_US.UTF-8        LC_TELEPHONE=en_US.UTF-8
> [11] LC_MEASUREMENT=en_US.UTF-8    LC_IDENTIFICATION=en_US.UTF-8
>
> attached base packages:
> [1] grid      stats     graphics  grDevices utils     datasets  methods
> [8] base
>
> other attached packages:
>  [1] rgdal_0.6-33  geoR_1.6-27   plotrix_3.2-2 ggplot2_0.8.9 proto_0.3-8
>  [6] reshape_0.8.4 plyr_1.4      raster_1.8-40 sp_0.9-76     rkward_0.5.6
>
> loaded via a namespace (and not attached):
> [1] lattice_0.19-26 tools_2.13.0
>