[R] extract function extracting only NA values
fabe at dmu.dk
Wed Apr 24 13:52:34 CEST 2013
So I think I might have found what is causing this problem. The values I
have in this raster
1st Qu. 1955256.000
3rd Qu. 79577730.000
From ArcMap though I get different values
min -69826224 and max 167780496
So maybe when I am importing the rest are in R something goes wrong and
all the values below a certain threshold are considered NA. Is this a
bug or do I get to use a specific parameter for the raster function?
On 4/24/2013 13:10, Fabio Berzaghi wrote:
> I have five raster files in ASCII format. With four of them I have no
> problem extracting values based on a set of X and Y coordinates.
> Unfortunately with one of the files all I managed to extract is NA
> values. To verify the problem I have opened the raster with ArcMap and
> there are no NA values where I am extracting. I have also plotted the
> spatial point class on top of the raster in R and it does correspond
> to the correct locations.
> These are some of the commands I am using, and as I already pointed
> out that works perfectly with other raster files.
> Can anyone help? At this point I am rather clueless about this.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide
> and provide commented, minimal, self-contained, reproducible code.
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