[GRASS5] i.tm.dehaze problem

[Markus Neteler]

On Mon, Aug 12, 2002 at 04:48:09PM +0200, Markus Neteler wrote:
> On Sat, Aug 10, 2002 at 07:21:14PM +0100, Gualter Barbas Baptista wrote:
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> > 
> > Hi,
> > 
> > I'm trying to run the i.tm.dehaze but I'm getting the errors below. Does 
> > anyone know what this means and how can be solved? I'm running 
> > 5.0.0pre3, could this be some old bug?
> > 
> > GRASS:~ > i.tm.dehaze inverno.tasscap.4 b1 b2 b3 b4 b5 b7
> > r.stats:  100%
> > 1 variables
> > 0 observations
> > ERROR: SVDCMP: You must augment A with extra zero rows
> 
> Hi,
> 
> this looks as a problem r.linear.regression. It is suspicious that
> there are '0 observations'.
> 
> Are you sure that you work in a region with data (check with d.erase;d.rast)?
> 
> Note that i.tm.dehaze is a script without good error testing.

Ok, I have submitted a simple error test which stop the script
when r.linear.regression stops due to erratic input.

Try i.tm.dehaze with a smaller region first. The input size is
somewhat limited according to the machine's resources where GRASS
is running on.

With my TM data it runs well.

Markus