Paulo,

The first error message is perhaps ambiguous, but the last one is very
clear: "No such file or directory".  It suggests that either the path does
not exist, or you are not allowed to write to it (from R).

Error in .local(.Object, ...) : Dataset copy failed
Error in file(filename, "w") : cannot open the connection
In addition: Warning message:
In file(filename, "w") :
 cannot open file
'/Users/paulobrando/Dropbox/R.projects/Xingu_Drought_2007/MODIS/MODIS_Temperature/maps/TEMP_2010_Xingu_AVG.asc':
No such file or directory

You can test with something like this:

write.table(data.frame(x=1),
file='~/Dropbox/R.projects/Xingu_Drought_2007/MODIS/MODIS_Temperature/maps/test.txt')

Also, the examples that you say do work cannot be correct. You say you use:
writeRaster(e,filename="~/Dropbox/R.projects/ex.tif", overwrite=TRUE)
to get a RasterLayer with
values      : /Users/paulobrando/Documents/RS/MODISTemp/test.tif
That is not possible.

Best, Robert








On Fri, Mar 30, 2012 at 6:18 AM, Paulo Brando <paulobrando@gmail.com> wrote:

> Dear All,
>
> I'm getting an error when I try to write a raster to file. Please see more
> details below.
>
> This example works:
>
> r <- raster(ncol=10, nrow=10)
>
> vals <- 1:ncell(r)
>
> r <- setValues(r, vals)
>
>
> writeRaster(r, filename="teste.tif")
>
> This one also works, using only one layer from MODIS temperature product:
>
> > ex
>
> class       : RasterLayer
>
> band        : 1
>
> dimensions  : 720, 657, 473040  (nrow, ncol, ncell)
>
> resolution  : 926.6254, 926.6254  (x, y)
>
> extent      : -6150259, -5541466, -1667926, -1000755  (xmin, xmax, ymin,
> ymax)
>
> coord. ref. : +proj=sinu +lon_0=0 +x_0=0 +y_0=0 +a=6371007.181
> +b=6371007.181 +units=m +no_defs
>
> values      :
> /Users/paulobrando/Documents/RS/MODISTemp/TEMP_2000_2010_Xingu_Monthly.grd
>
> min value   : 18.85999
>
> max value   : 37.79999
>
> layer name  : layer.1
>
>
>
> writeRaster(e,filename="~/Dropbox/R.projects/ex.tif",
>  overwrite=TRUE)
>
> class       : RasterLayer
>
> dimensions  : 720, 657, 473040  (nrow, ncol, ncell)
>
> resolution  : 926.6254, 926.6254  (x, y)
>
> extent      : -6150259, -5541466, -1667926, -1000755  (xmin, xmax, ymin,
> ymax)
>
> coord. ref. : +proj=sinu +lon_0=0 +x_0=0 +y_0=0 +a=6371007.181
> +b=6371007.181 +units=m +no_defs
>
> values      : /Users/paulobrando/Documents/RS/MODISTemp/test.tif
>
> min value   : 18.85999
>
> max value   : 37.79999
>
> layer name  : test
>
> But when we I attempt use calc to take the average of a MODIS time-series,
> I get an error:
>
> > sub.07
>
> class       : RasterLayer
>
> dimensions  : 720, 657, 473040  (nrow, ncol, ncell)
>
> resolution  : 926.6254, 926.6254  (x, y)
>
> extent      : -6150259, -5541466, -1667926, -1000755  (xmin, xmax, ymin,
> ymax)
>
> coord. ref. : +proj=sinu +lon_0=0 +x_0=0 +y_0=0 +a=6371007.181
> +b=6371007.181 +units=m +no_defs
>
> values      : in memory
>
> min value   : 24.935
>
> max value   : 43.112
>
> layer name  : layer
>
>
> #trying to save as tif
>
> > writeRaster(sub.07,
>
> filename="~/Dropbox/R.projects/Xingu_Drought_2007/MODIS/MODIS_Temperature/maps/TEMP_2010_Xingu_AVG.tif",
>
> + overwrite=TRUE)
>
> Error in .local(.Object, ...) : Dataset copy failed
>
>
> #trying to save as asc
>
> > writeRaster(sub.07,
>
> filename="~/Dropbox/R.projects/Xingu_Drought_2007/MODIS/MODIS_Temperature/maps/TEMP_2010_Xingu_AVG.asc",
>
> + overwrite=TRUE)
>
> Error in file(filename, "w") : cannot open the connection
>
> In addition: Warning message:
>
> In file(filename, "w") :
>
>  cannot open file
>
> '/Users/paulobrando/Dropbox/R.projects/Xingu_Drought_2007/MODIS/MODIS_Temperature/maps/TEMP_2010_Xingu_AVG.asc':
> No such file or directory
>
>
>
> I am running R on a mac.
>
> > sessionInfo()
>
> R version 2.14.2 (2012-02-29)
>
> Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
>
>
> locale:
>
> [1] C
>
>
> attached base packages:
>
> [1] grid      splines   stats     graphics  grDevices utils     datasets
>
> [8] methods   base
>
>
> other attached packages:
>
>  [1] ncdf_1.6.6          rasterVis_0.10-9    hexbin_1.26.0
>
>  [4] latticeExtra_0.6-19 RColorBrewer_1.0-5  lattice_0.20-0
>
>  [7] raster_1.9-77       rgdal_0.7-8         sp_0.9-95
>
> [10] Hmisc_3.9-2         survival_2.36-12    rj_1.0.3-7
>
>
> loaded via a namespace (and not attached):
>
> [1] cluster_1.14.2 rj.gd_1.0.3-3  tcltk_2.14.2   tools_2.14.2   zoo_1.7-7
>
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>
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