Re: problem with Part function
- To: mathgroup at smc.vnet.net
- Subject: [mg18197] Re: problem with Part function
- From: dreeves at flip.eecs.umich.edu (Daniel Reeves)
- Date: Mon, 21 Jun 1999 22:50:38 -0400
- References: <7kho9q$qop@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
This may be what you were thinking of with Apply: mat[[##]]&@@xy but you can't assign to it. So you could use ReplacePart: mat = ReplacePart[mat,1,xy]; -- -- -- -- -- -- -- -- -- -- -- -- Daniel Reeves http://ai.eecs.umich.edu/people/dreeves/ On 19 Jun 1999, Casubolo Dario wrote: > > Just a little problem: > I've a matrix of zeros, say: > mat=Table[Table[0,{5}],{5}]; > then, I've a point in xy axys, > xy={3,3}; > now, I want the position {3,3} of matrix becomes 1; > if I write > mat[[xy]]=1; or mat[[{3,3}]]=1; it doesn't work; only mat[[3,3]]=1 > works, but I don't want rewrite all. > I think I've to use something like Map, Thread, Apply or so, but I don't > know what and how exactely; > please, someone help me. > THANK YOU > > Dario Casubolo > email: bubbola at workline.it > > >