R help - Oct 2003 - NA's from GRASS-package

Hello, 

I run R inside GRASS and tried to obtain values of a raster file inside GRASS 
but this raster image contains only a few relevant pixel and approx. 1.5 
Mill. NA's, I did

G <- gmeta()
sites1 <- rast.get(G, "sites1")
df.sites1 <- data.frame(east(G), north(G), sites1, na.action=na.omit)
Error in as.data.frame.default(x[[i]], optional = TRUE) :
        can't coerce function into a data.frame

executing it without na.action works fine but with 1.5 Mill. redundant values. 

any advice how I receive the relevant 100 values without the NA's?

thanks in advance cheers Martin

?data.frame will show na.action is not an argument to data.frame.

na.omit(data.frame(east(G), north(G), sites1)) might be what you want.

On Mon, 13 Oct 2003, Martin Wegmann wrote:
> I run R inside GRASS and tried to obtain values of a raster file inside
GRASS
> but this raster image contains only a few relevant pixel and approx. 1.5 
> Mill. NA's, I did
> 
> G <- gmeta()
> sites1 <- rast.get(G, "sites1")
> df.sites1 <- data.frame(east(G), north(G), sites1, na.action=na.omit)
> Error in as.data.frame.default(x[[i]], optional = TRUE) :
>         can't coerce function into a data.frame
> 
> executing it without na.action works fine but with 1.5 Mill. redundant
values.
> 
> any advice how I receive the relevant 100 values without the NA's?

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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