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set difference, with duplicates [message #92702]

Wed, 10 February 2016 12:03

Russell[1]
Messages: 101
Registered: August 2011

Senior Member

Hi everyone...

I have two long-integer arrays, one of which contains duplicate entries, and I'd like to find the elements in a but not in b. For example:

a=[2,3,4,5,2,3,5,2,4,3,10,100]
b=[2,10]

I'd like set operator that computes a dif b, but preserves the duplicate entries (and order if possible) for a. For example,

c = set_difference(a,b)

and I would want

c=[3,4,5,3,5,4,3,100]

I'm aware of the Coyote's cgsetdifference, but that does not preserve duplicates (or I didn't realize the right set of options).

Any ideas? If it helps, the a-array may be very long 10^5 elements and the b array will be 10^3 elements. I also expect the values to be very high, but I can compress them to the lowest possible integer arrays.

Thanks for any advice,
Russell

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[Message index]

		set difference, with duplicates By: Russell[1] on Wed, 10 February 2016 12:03
		Re: set difference, with duplicates By: Burch on Wed, 10 February 2016 12:23

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