Re: Replace, test question
- To: mathgroup at smc.vnet.net
- Subject: [mg120335] Re: Replace, test question
- From: DrMajorBob <btreat1 at austin.rr.com>
- Date: Tue, 19 Jul 2011 06:57:09 -0400 (EDT)
- References: <201107181013.GAA26882@smc.vnet.net>
- Reply-to: drmajorbob at yahoo.com
{58, 61, 15, 66, 10, 2, 24, 81, 45, 84} /. x_ /; PrimeQ@x -> P
{58, P, 15, 66, 10, P, 24, 81, 45, 84}
or
{58, 61, 15, 66, 10, 2, 24, 81, 45, 84} /. x_?PrimeQ -> P
{58, P, 15, 66, 10, P, 24, 81, 45, 84}
Bobby
On Mon, 18 Jul 2011 05:13:23 -0500, PA32R <tio540s1 at gmail.com> wrote:
> I'm very new to Mathematica and trying to work my way through it. I
> don't understand why:
> {58, 61, 15, 66, 10, 2, 24, 81, 45, 84} /. x_ /; PrimeQ -> P
> returns:
> {58, 61, 15, 66, 10, 2, 24, 81, 45, 84}
>
> I would expect it to take the list, replace everything in the list
> that matches any pattern and passes the PrimeQ test, i.e., is prime,
> with P to yield:
> {58, P, 15, 66, 10, P, 14, 81, 45, 84}
>
> Can someone explain my misunderstanding?
>
> Thanks.
>
--
DrMajorBob at yahoo.com
- References:
- Replace, test question
- From: PA32R <tio540s1@gmail.com>
- Replace, test question