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Re: Finding strings values common to two (large!) arrays [message #92195 is a reply to message #92078]

Wed, 28 October 2015 09:25

Russell[1]
Messages: 101
Registered: August 2011

Senior Member

On Wednesday, October 7, 2015 at 10:13:59 AM UTC-4, rj...@le.ac.uk wrote:
> I have arrays of numerical IDs in string format.
>
> I want to find all of the indices in Array A that contain a value that is present anywhere in Array B.
>
> The arrays are both quite large (>1 million values) so a loop is out of the question and them being strings complicates it as well.
>
> Any IDL Way tips?

AGGH! Jeremy beat me to it. I would think you want to map your strings onto the unique set of integers following Jeremy's post. Then perhaps you could use histogram on the mapped integers.

-Russell

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[Message index]

		Finding strings values common to two (large!) arrays By: rjp23 on Wed, 07 October 2015 07:13
		Re: Finding strings values common to two (large!) arrays By: Helder Marchetto on Wed, 07 October 2015 07:45
		Re: Finding strings values common to two (large!) arrays By: wlandsman on Wed, 07 October 2015 08:09
		Re: Finding strings values common to two (large!) arrays By: rjp23 on Wed, 07 October 2015 08:21
		Re: Finding strings values common to two (large!) arrays By: Lajos Foldy on Wed, 07 October 2015 09:17
		Re: Finding strings values common to two (large!) arrays By: rjp23 on Wed, 07 October 2015 12:57
		Re: Finding strings values common to two (large!) arrays By: Craig Markwardt on Wed, 07 October 2015 15:19
		Re: Finding strings values common to two (large!) arrays By: rjp23 on Thu, 08 October 2015 04:40
		Re: Finding strings values common to two (large!) arrays By: Jeremy Bailin on Wed, 28 October 2015 09:00
		Re: Finding strings values common to two (large!) arrays By: Russell[1] on Wed, 28 October 2015 09:25
		Re: Finding strings values common to two (large!) arrays By: Jeremy Bailin on Wed, 28 October 2015 09:40
		Re: Finding strings values common to two (large!) arrays By: Russell[1] on Wed, 28 October 2015 12:26
		Re: Finding strings values common to two (large!) arrays By: Dick Jackson on Wed, 28 October 2015 14:48
		Re: Finding strings values common to two (large!) arrays By: Dick Jackson on Wed, 28 October 2015 14:53
		Re: Finding strings values common to two (large!) arrays By: Jeremy Bailin on Thu, 29 October 2015 11:17
		Re: Finding strings values common to two (large!) arrays By: Dick Jackson on Thu, 29 October 2015 15:47

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