R help - Aug 2012 - Adjusting coordinates in raster plots

Dear R-Help,

When plotting a raster object the origin (0,0) is placed in the center.

E.g. using: 
library(raster)
mat = matrix(runif(100),10,10)
r <- raster(ncol=10, nrow=10)
values(r) <- mat
plot(r, main='Raster example',xlab="x",ylab="y") 

Does anyone know how to adjust the coordinate system?
E.g. I would like to have 0,0 at the top left.
My naive approach was to use "axis()" but this has no effect.

Thanks in advance for any advice.

Best regards,
Jan

Like this?

r <- raster(ncol=10, nrow=10, xmn=0, ymx=0)
values(r) <- mat
plot(r)

----------------------------------------------
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77843-4352

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Jan Sudeikat
> Sent: Wednesday, August 08, 2012 3:54 PM
> To: r-help at r-project.org
> Subject: [R] Adjusting coordinates in raster plots
> 
> Dear R-Help,
> 
> When plotting a raster object the origin (0,0) is placed in the center.
> 
> E.g. using:
> library(raster)
> mat = matrix(runif(100),10,10)
> r <- raster(ncol=10, nrow=10)
> values(r) <- mat
> plot(r, main='Raster
example',xlab="x",ylab="y")
> 
> Does anyone know how to adjust the coordinate system?
> E.g. I would like to have 0,0 at the top left.
> My naive approach was to use "axis()" but this has no effect.
> 
> Thanks in advance for any advice.
> 
> Best regards,
> Jan
> 
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