Groups > comp.soft-sys.math.mathematica > #3408

Re: How to find the difference between two lists (opposite of union[]?)

From	"McHale, Paul" <Paul.McHale@excelitas.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	Re: How to find the difference between two lists (opposite of union[]?)
Date	2011-06-30 20:56 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<iuinul$kv5$1@smc.vnet.net> (permalink)

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Thank you everyone for the many posts.  I know there had to be an easier way.  Went through the documentation but embarrassingly stepped right over it.

Thanks again,
Paul

Paul McHale  |  Electrical Engineer, Energetics Systems  |  Excelitas Technologies Corp.

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Paul.McHale@Excelitas.com
www.excelitas.com

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Thank you

-----Original Message-----
From: Bill Rowe [mailto:readnews@sbcglobal.net]
Sent: Wednesday, June 29, 2011 5:29 AM
Subject: Re: How to find the difference between two lists (opposite of union[]?)

On 6/28/11 at 7:55 AM, Paul.McHale@excelitas.com (McHale, Paul)
wrote:

>I want to generate 1000 random integers between 1 and 1000.  Then
>find out what numbers between 1 and 1000 were not generated.

generatedNumbers==RandomInteger[{1,1000},{1000}];
missingNumbers == Complement[Range[1000],generatedNumbers];

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Re: How to find the difference between two lists (opposite of union[]?) "McHale, Paul" <Paul.McHale@excelitas.com> - 2011-06-30 20:56 +0000

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