[R-sig-Geo] Aggregate data to lower resolution

[Loïc Dutrieux]

Hi Milu,

The code you provided works perfectly on my computer. What doesn't work 
in your case? Do you get an error message?

Cheers,
Loïc

On 21/07/2016 22:57, Miluji Sb wrote:
> Dear all,
>
> I have the following GDP data by latitude and longitude at 0.5 degree by
> 0.5 degree.
>
> temp <- dput(head(ptsDF,10))
> structure(list(longitude = c(-68.25, -67.75, -67.25, -68.25,
> -67.75, -67.25, -71.25, -70.75, -69.25, -68.75), latitude = c(-54.75,
> -54.75, -54.75, -54.25, -54.25, -54.25, -53.75, -53.75, -53.75,
> -53.75), GDP = c(1.683046, 0.3212307, 0.0486207, 0.1223268, 0.0171909,
> 0.0062104, 0.22379, 0.1406729, 0.0030038, 0.0057422)), .Names =
> c("longitude",
> "latitude", "GDP"), row.names = c(4L, 17L, 30L, 43L, 56L, 69L,
> 82L, 95L, 108L, 121L), class = "data.frame")
>
> I would like to aggregate the data 1 degree by 1 degree. I understand that
> the first step is to convert to raster. I have tried:
>
> rasterDF <- rasterFromXYZ(temp)
> r <- aggregate(rasterDF,fact=2, fun=sum)
>
> But this does not seem to work. Could anyone help me out please? Thank you
> in advance.
>
> Sincerely,
>
> Milu
>
> 	[[alternative HTML version deleted]]
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo at r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>