Markus Neteler wrote:
On Tue, Jan 23, 2001 at 12:32:30PM -0300, Horacio wrote:
> Hi,
> I'm trying to embed r.mapcalc command in a bash script... I'm having
> troubles understanding how r.mapcalc handles variables...
>
> for example in a for loop:
>
> r.mapcalc final_$sp_name = $sp_name && (dem <= $((max_$sp_name)) && (dem
> >= $((min_$sp_name))
>
>
> I understand that some characters can cause troubles in the shell
> interpretation for wich I should use something like...
>
>
> r.mapcalc final_$sp_name \= $sp_name \&\& \(dem \<\= $((max_$sp_name))
> \&\& \(dem \>\= $((min_$sp_name))\)
>
>
> but it still doesn't work...
Horacio,
it's pretty easy:
r.mapcalc final_$sp_name="formula"
^ ^
This will prevent the shell from expaning braces etc. wrongly.
However, you will need to use the "if()" function if you want to
test values.
See:
http://www.geog.uni-hannover.de/grass/gdp/html_grass5/html/r.mapcalc.html
and the two refs mentioned in "SEE ALSO" on this page.
Hope this helps
Dear friends,
Of course that "quotes" do it... but i still have trouble (maybe b'cuz
i'm not a programer...) this is my script:
---------- start script ------------
max_acacia_caven=160
max_acaena_antarctica=1600
.
.
.
min_acacia_caven=10
min_acaena_antarctica=100
.
.
.
for sp_name in acacia_caven acaena_antarctica acaena_magellanica ...
do
r.mapcalc final_$sp_name = $sp_name && (dem <= $((max_$sp_name)) &&
(dem >= $((min_$sp_name)))
g.remove tmp_$sp_name
done
exit 0
----------- end ---------------------
The error I get is just a: "you have confused me"!
So I think that the thing is how I define the $((variable))... I'm
boubting that GRASS understand it, although the SHELL does!
if I do:
sp_name=acacia_caven;max_acacia_caven=160;min_acacia_caven=10
echo $((max_$sp_name))
I get -> 160
wich is what I need to "cut" my map....
Any idea?
Thank you very much.
Horacio
--
Horacio Samaniego
Dep. Ecologia
P. Universidad Catolica
Alameda 340
Santiago, Chile
Fono: (56 2)686 2950
Fax: (56 2)686 2621
Email: hsamanie@bio.puc.cl
(http://akodon.bio.puc.cl/horacio)
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Hi,
I have just installed GRASS for cygwin. I can get it to work in Xfree86 but
would like to try running it with star net xwin-32. The instructions for
starting grass with this x server refer to a startgrass.bat file. I cannot
find this file anywhere, has something changed that is not mentioned in the
readme document ? Do I need this file and if so, where can I get it.
Thanks
Morgan