Re: What's the matter with this?
- To: mathgroup at smc.vnet.net
- Subject: [mg56125] Re: [mg56109] What's the matter with this?
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Sat, 16 Apr 2005 03:52:01 -0400 (EDT)
- References: <200504150848.EAA11621@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
On 15 Apr 2005, at 17:48, Steve Gray wrote:
> *This message was transferred with a trial version of CommuniGate(tm)
> Pro*
> I have a list
>
> intertemp[[1]] = {{14, 17, {0.7929, 0.4366}, {2.8146, 11.3986}}
>
> and a simple function
>
> modxx[axx_] := axx[[2]] = Mod[axx[[2]], 14, 1];
>
> When I do modxx[intertemp[[1]]] I get this:
>
> Set::setps: {14, 17, {0.792902, <<19>>}, {2.81469, 11.3986}}
> in assignment of part is not a symbol.
>
> What does this mean and how can I do it correctly?
> I must be making a very simple error.
> I want the 17 to become 3 with no other changes.
>
> Thank you
>
> Steve Gray
>
>
You need to give your function moddxx the HoldFirst attribute with
SetAttributes[modxx, HoldFirst]
and everything should work fine.
Andrzej Kozlowski
Chiba, Japan
http://www.akikoz.net/andrzej/index.html
http://www.mimuw.edu.pl/~akoz/
- References:
- What's the matter with this?
- From: Steve Gray <stevebg@adelphia.net>
- What's the matter with this?