[R-sig-Geo] SpatialGridDataFrame and asc - Matrix inversion with as.asc(as.matrix(x))

[Paulo E. Cardoso]

Milton, It works just like you proposed. Solved
Thanks.

____________
Paulo E. Cardoso

> -----Mensagem original-----
> De: r-sig-geo-bounces at stat.math.ethz.ch [mailto:r-sig-geo-
> bounces at stat.math.ethz.ch] Em nome de Paulo E. Cardoso
> Enviada: terça-feira, 21 de Julho de 2009 11:30
> Para: 'milton ruser'
> Cc: 'R-sig-Geo'
> Assunto: Re: [R-sig-Geo] SpatialGridDataFrame and asc - Matrix
> inversion with as.asc(as.matrix(x))
> 
> Hi Milton,
> 
> 
> 
> This is flipping columns and I'd like to flip rows instead.
> 
> 
> 
> x <- 1:12 ; dim(x) <- c(4,3)
> 
> x
> 
> x<-x[,dim(x)[2]:1]
> 
> x
> 
> 
> 
> Beside this, I'd like to know if this could be done with the
> SpatialGridDataFrame.
> 
> 
> 
> Any idea?
> 
> ____________
> 
> Paulo E. Cardoso
> 
> 
> 
> De: milton ruser [mailto:milton.ruser at gmail.com]
> Enviada: terga-feira, 21 de Julho de 2009 11:17
> Para: Paulo E. Cardoso
> Cc: R-sig-Geo
> Assunto: Re: [R-sig-Geo] SpatialGridDataFrame and asc - Matrix
> inversion with as.asc(as.matrix(x))
> 
> 
> 
> Hi Paulo,
> 
> 
> 
> try this:
> 
> 
> 
> x<-x[,dim(x)[2]:1]
> 
> cheers
> 
> 
> 
> milton
> 
> On Tue, Jul 21, 2009 at 5:53 AM, Paulo E. Cardoso
> <pecardoso at netcabo.pt>
> wrote:
> 
> By converting a SpatialGridDataFrame into a asc object with
> 
> 
> 
> asc.obj <- as.asc(as.matrix(x),xll = 0.5, yll = 0.5)
> 
> 
> 
> the object created have inverted rows. It apparently starts reading
> from bellow, inverting row reading but keeping columns unchanged.
> 
> 
> 
> The result is a flipped image.
> 
> 
> 
> Can this be corrected and how?
> 
> ____________
> 
> Paulo E. Cardoso
> 
> 
> 
> 
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