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Otilia1-Visitor
1-Visitor
February 28, 2019
Solved

find last value in a vector greater than 0

  • February 28, 2019
  • 2 replies
  • 3528 views

Hello,

 

I have to find the last value from a vector which is bigger from 0, as in the attached example. How can it be determined?

 

Thank you,

Otilia

Best answer by Werner_E

There are many ways to skin a cat.

Here are a few alternatives but I'd stay with Luc's approach, maybe adding some error check as shown in variant 3.

Variant 4 is a classic programming approach.

B.png

2 replies

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LucMeekes23-Emerald IV
23-Emerald IV
February 28, 2019

Easy:

LM_20190228_LastPositive.png

Success!

Luc

    W
    Werner_E25-Diamond IAnswer
    25-Diamond I
    February 28, 2019

    There are many ways to skin a cat.

    Here are a few alternatives but I'd stay with Luc's approach, maybe adding some error check as shown in variant 3.

    Variant 4 is a classic programming approach.

    B.png

      L
      LucMeekes23-Emerald IV
      23-Emerald IV
      February 28, 2019

      My implementation gives an error message when there is no positive element in V. And the error message will be at least somewhat to the point.

      Your alternatives (LastPositive2, 3 and 4) will fail when ORIGIN is other than 0...

       

      Luc

      W
      Werner_E25-Diamond I
      25-Diamond I
      February 28, 2019

      Correct, but you would simply have to replace "0" by "ORIGIN" to make the calculations ORIGIN-aware. But as already written above I'd prefer your solution anyway as its the shortest and most streamline.

      I'd just rather prefer an error handling I can control rather than having the calculations fail with an error thrown by the built-in command.

      It depends on how you would use the functions if  a custom made error message created with the error command is preferable or if the function should still return a well defined result like NaN in case of an error. I usually prefer a NaN result.

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