[GRASSLIST:5817] Re: linear regression of 2 rasters

[Dylan Beaudette]

Thanks for the info Roger.

Since most of my analysis deals with raster data, GRASS54 will work.

By default my locale is set to UTF-8... R was a little upset about this. The 
history and arrow keys were not functioning (control sequences were appearing 
instead of a previous entry, or moving the cursor to the left or right)... I 
tried setting all locale-related variables to C, and re-running R. R no 
longer complained, but the history and arrow keys still do not work.

here is a sample of what appears on the screen when i press one of the arrow 
keys:
^[[A^[[D^[[C     (up, left, right)

Any ideas?

On Wednesday 16 February 2005 12:16 pm, Roger Bivand wrote:
> On Wed, 16 Feb 2005, Dylan Beaudette wrote:
> > Hi everyone,
> >
> > Is there any simple way in GRASS to do a linear regression of 2 raster
> > files, or would I need to first subsample with vector points?
> >
> > Or- is there anyway to do this in gnuplot / R.
> >
> > I have found that R is not behaving like it used to, when used with
> > GRASS54...
>
> See the STATGRASS mailing list. The switch to the 3D WINDOW means that
> regular service is currently only supported for GRASS up to and including
> 5.4. The work-around is to use interp=TRUE in gmeta() and perhaps
> elsewhere, because the compiled code in the R/GRASS interface only works
> with 2D WINDOWs, and there is nothing to condition against in 6.0.0beta
> (there will be an environment variable in 6.0.0 when it comes). If the
> interpreted interface is good enough (exchanging ASCII files), 6.0.0beta
> may work.
>
> Once 6.0.0 stabilises, a fresh version of the interface will appear. If
> people want to help, I'll put it on sourceforge and give developer write
> access if that would help. It isn't obvious how to do this right, because
> it is a contributed package to both R and GRASS, so has to suit build
> trains and constraints across platforms, and keep working for 5.* users.
>
> Roger
>
> > Any ideas?

-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341