cat file for r.mapcalc

[Bill Jackson]

> From grass-lists-owner at moon.cecer.army.mil Fri Oct 13 16:20:07 1995
> Sender: grass-lists-owner at moon.cecer.army.mil
> Reply-To: grassu-list at moon.cecer.army.mil
> To: info-grass-user at uunet.uu.net
> Path: access1!zhuang
> From: zhuang at access.digex.net (Xin Zhuang)
> Newsgroups: info.grass.user
> Subject: cat file for r.mapcalc
> Date: 13 Oct 1995 16:46:30 -0400
> Organization: Express Access Online Communications, Greenbelt, MD USA
> Lines: 30
> Keywords: cats, r.mapcalc
> Content-Length: 431
> 
> I have two layers: left and right. They don't overlay.
> I'd like to merge them together. Guess I can use
> either
> 	new = left + right
> or more safely
> 	new=if(left,left,right)
> 
> However, there won't be category contents for Layer "new".
> Is there a way to bring category contents in Layers "left"
> and "right" into Layer "new"?
> Or maybe I should use another function?
> 
> 
> Appreciate any hint and help.
> 
> 
> 
> zhuang at access.digex.net

Have you looked at r.patch?

Bill Jackson
LL-N
USACERL