[GRASS-dev] strange mapcalc result

[Michael Barton]

I just ran this again and it works fine, with and without the spaces--and even copying over the original file. That is, it all works as originally expected it to work. I don't know why this did not work the other day. I tried it several times. The command I sent to the list was copied from my terminal produced all nulls. Now it produces the expected values.

Weird

Michael
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity 
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State University

voice: 	480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax:          480-965-7671 (SHESC),  480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu











On Jul 17, 2011, at 9:47 AM, Markus Neteler wrote:

> On Mon, Jul 11, 2011 at 7:36 PM, Michael Barton <Michael.Barton at asu.edu> wrote:
>> This is from GRASS 7 compiled from svn trunk yesterday.
>> 
>> I'm simply trying to assign null values in an SRTM using r.mapcalc. I do the following statement...
>> 
>> r.mapcalc expression='SRTM_ffB03_p199r033=if(SRTM_ffB03_p199r033==-32768,null(),SRTM_ffB03_p199r033)' --o
>> 
>> 
>> The entire map turns to null.
>> 
>> Any idea what I'm doing wrong?
> 
> Try this:
> 
> r.mapcalc expression='SRTM_ffB03_p199r033 =
> if(SRTM_ffB03_p199r033==-32768,null(),SRTM_ffB03_p199r033)' --o
> 
> (note the white spaces around "=", which is required in GRASS7 - a bit
> unfortunate...)
> 
> Markus