Re: Array
- To: mathgroup at smc.vnet.net
- Subject: [mg69250] Re: Array
- From: Peter Pein <petsie at dordos.net>
- Date: Sun, 3 Sep 2006 23:46:44 -0400 (EDT)
- References: <eddptn$3q3$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Bruce Colletti schrieb:
> The command:
>
> {A[1], A[2], A[3]} = {1, 2, 3}
>
> assigns a value to each A-variable. However, the command:
>
> Array[A,3] = {1,2,3}
>
> generates an error message.
>
> What is the difference between the two lines?
>
> Thankx.
>
> Bruce
>
Hi Bruce,
in the first line you evaluated Array[A,3] manually _before_ setting
the value(s). The second line fails, because Set has got the attribute
HoldFirst and Array is protected.
Evaluate[Array[A,3]]={1,2,3} works perfectly.
Peter