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Re: How to Do a Replacement with Two Conditions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg119693] Re: How to Do a Replacement with Two Conditions
  • From: Ray Koopman <koopman at sfu.ca>
  • Date: Fri, 17 Jun 2011 05:51:42 -0400 (EDT)
  • References: <itejv3$s36$1@smc.vnet.net>

On Jun 16, 9:08 pm, Gregory Lypny <gregory.ly... at videotron.ca> wrote:
> Hello everyone,
>
> I have a list of integers and I want to replace numbers bigger than 180 with one and those less than or equal to 180 with 0 to create a dummy variable.  The ones are easy:
>
>         myList /. x_ /; x > 180 -> 1
>
> How do I get the zeros in there?
>
> Regards,
>
> Gregory

mylist = {179, 180, 181, 182};
UnitStep[mylist - 181]

{0, 0, 1, 1}


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