[GRASS-user] scripting mapcalc

Daniel Victoria daniel.victoria at gmail.com
Fri Mar 6 06:21:20 EST 2009

Hi Glynn,

That is good to know. I started using that form because I would always
get confused with ' and " so I though that using the echo command
would be safer. But now that I know better, my scripts will be simpler


On Fri, Mar 6, 2009 at 1:41 AM, Glynn Clements <glynn at gclements.plus.com> wrote:
> There is no advantage to using the above form. Even if you use:
>        r.mapcalc "river = if(river == $old, $new, null())"
> the variables are still expanded by the shell.
> --
> Glynn Clements <glynn at gclements.plus.com>

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