Re: Error message need explaination in english
- To: mathgroup at smc.vnet.net
- Subject: [mg78657] Re: [mg78631] Error message need explaination in english
- From: DrMajorBob <drmajorbob at bigfoot.com>
- Date: Fri, 6 Jul 2007 03:25:51 -0400 (EDT)
- References: <27555612.1183630922905.JavaMail.root@m35>
- Reply-to: drmajorbob at bigfoot.com
You passed metareplace a constant, and metareplace tried to change it.
This avoids passing metaraplace's argument "by value":
Q = Range[10];
size[group_] = Length[group];
SetAttributes[metareplace, HoldFirst]
metareplace[
group_] := (group[[Random[Integer, {1, size[group]}]]] =
hubl[metacommunity]);
metareplace[Q]
Q
hubl[metacommunity]
{hubl[metacommunity], 2, 3, 4, 5, 6, 7, 8, 9, 10}
Bobby
On Thu, 05 Jul 2007 04:51:50 -0500, JGBoone at gmail.com <JGBoone at gmail.com>
wrote:
> So i put in these commands
>
> Q=Range[10];
> size[group_]=Length[group];
> metareplace[group_] := (group[[Random[Integer, {1, size[group]}]]] ==
> hubl[metacommunity]);
> (*takes random element of community size and replaces it with random
> element of metacommunity by way of the function hubl[group_]*)
> metareplace[Q]
>
>
> and get this error message
>
> Set::setps: {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} in assignment of part is
> not a symbol
>
> looking at the help menu only confuses me further. can anyone tell me
> in layman's terms what the messages means?
> thanks
>
>
>
--
DrMajorBob at bigfoot.com