[GRASS-stats] writeRAST fails to write empty raster

Roger Bivand Roger.Bivand at nhh.no
Thu Jun 11 14:38:56 PDT 2015

On Thu, 11 Jun 2015, Anna Petrášová wrote:

> Hi,
> I am using R rgrass7 package and it seems that when writing a raster which
> has only NA, it fails with "only numeric values may be exported":
> https://github.com/cran/rgrass7/blob/386b11e5a2f3879ec63d299c0594f55cbd39c8e5/R/bin_link.R#L446

This site has nothing whatsoever to do with anything, and is certainly 
unauthorised. Please only refer to R-Forge:


shows the full context, file name, but not line number.

Are your NAs numeric?

> is.numeric(NA)
> is.numeric(as.numeric(NA))
[1] TRUE

> Is this intended behavior or a bug?

User misunderstanding. NAs are logical unless created in the context of an 
object with a different storage mode.

> Thank you,
> Anna

Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 91 00
e-mail: Roger.Bivand at nhh.no

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