Array position - another approach

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Array position - another approach

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ndtma		#1 Posted : 07 September 2023 18:34:24(UTC)
Rank: Advanced Member Groups: Registered Joined: 05/06/2014(UTC) Posts: 348 Location: Colombo Was thanked: 125 time(s) in 82 post(s)		Hi, I remember there were some useful posts to find the positions in an array satisfying defined conditions. Another approach is attached. Array_Pos2.sm (16kb) downloaded 13 time(s). Edited by user 07 September 2023 18:36:31(UTC) \| Reason: Not specified
		Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

4 users thanked ndtma for this useful post.		on 07/09/2023(UTC), on 07/09/2023(UTC), on 08/09/2023(UTC), on 07/04/2024(UTC)
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alyles		#2 Posted : 08 September 2023 20:59:13(UTC)
Rank: Advanced Member Groups: Registered Joined: 23/03/2016(UTC) Posts: 277 Was thanked: 91 time(s) in 57 post(s)		To expand on this concept further, I generally avoid using augment/stack functions with vectors of indeterminate size. The reason being that there is generally quite a bit of overhead in using those functions when it comes to execution time. I propose an alternative method shown here. Firstly we perform the test on the input matrix to determine the size of the result vector and location of results in input matrix. Then we instantiate the result vector and fill it in. To demonstrate the difference in execution I've also created a 100x100 input vector and timed the execution of both algorithms. The execution time difference becomes more apparent the larger the input matrix becomes. Array_Pos2.pdf (138kb) downloaded 6 time(s). Array_Pos2.sm (45kb) downloaded 17 time(s).
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3 users thanked alyles for this useful post.		on 08/09/2023(UTC), on 08/09/2023(UTC), on 09/09/2023(UTC)
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