Re: Replace
- To: mathgroup at smc.vnet.net
- Subject: [mg121083] Re: Replace
- From: Armand Tamzarian <mike.honeychurch at gmail.com>
- Date: Fri, 26 Aug 2011 05:25:32 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <j35am1$og8$1@smc.vnet.net>
On Aug 25, 9:12 pm, Sam Korn <s... at kornfamily.com> wrote:
> Hi, another stupid question. I have a list, and each element in the list is
> a sublist with a pair of integers. How do I replace each element along the
> lines of "{5,6}" with "(5|6)"?
>
> I know it's a stupid question, and there's probably something really obvious
> I'm missing, but I'm really new to Mathematica.
>
> Thanks!
> -Sam
Here are a couple of ways:
tmp = RandomInteger[{1, 20}, {20, 2}]
First using Replace
tmp /. {x_, y_} :> x/y
For many this is a more intuitive way of doing it but will be
(relatively) slow for very large lists. This is a faster way of doing
it:
tmp[[All, 1]]/tmp[[All, 2]]
Mike