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Re: Removing list elements in x by list y

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  • Subject: [mg131154] Re: Removing list elements in x by list y
  • From: Ray Koopman <koopman at sfu.ca>
  • Date: Fri, 14 Jun 2013 05:03:56 -0400 (EDT)
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DeleteCases[x,Alternatives@@y]

----- Dr. Wolfgang Hintze <weh at snafu.de> wrote:

> I have simple question.
> 
> Given two lists
> 
> x = {u, v, w, w, d};
> y = {u, d};
> 
> I wish to "subtract" y from x, i.e. remove exactly the elements in x
> which belong to y giving
> 
> x "-" y = {v,w,w}
> 
> Complement[] gives instead {v,w}.
> Note that we are talking about lists rather than sets.
> 
> I'm sure there is a simple standard command, but I can't find it.
> Can you?
> 
> Regards,
> Wolfgang



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