Re: Working in Modules

• To: mathgroup at smc.vnet.net
• Subject: [mg15923] Re: Working in Modules
• From: "Roger Wilson" <roger.wilson at nomura.co.uk>
• Date: Wed, 17 Feb 1999 23:33:56 -0500
• Organization: Nomura International PLC
• References: <7a2c0d\$1ul@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

```Init doesn't return the list you think it should because you haven't reset
the value of s.  You've done substitution s /. {0->-1} but this doesn't
change the value of s it just returns a list that you haven't put anywhere
and then returned Partition[s,n].

You need to do s=s/.{0->-1}; inside init 1 instead of just s/.{0->-1};

Roger

Dr D McK Paul wrote in message <7a2c0d\$1ul at smc.vnet.net>...
>This is my third attempt to post this question. No idea why it doesnt
>work. I'm not an expert in Mathematica and would appreciate comments on
>why init1 returns a list with all zeros replaced by -1, but init does
>not. Its probably very simple but its confused me.
>
>Don
>
>init[n_Integer]:=Module[
>                    {s=Table[Random[Integer],{n n}]},
>                    s/.{0->-1};
>                    Partition[s,n]
>                    ]
>
>init1[n_Integer]:=Module[
>                    {s=Table[Random[Integer],{n n}]},
>                    s/.{0->-1}
>                    ]
>
>
>--
>

```

• Prev by Date: Re: Coupled Diff Eqn
• Next by Date: Re: Coupled Diff Eqn
• Previous by thread: Re: Working in Modules
• Next by thread: Re: Working in Modules