how to sum up the numbers from a group

Hi Open Foris Team, I have a question - Can you please explain to me how to sum up the numbers in the following case: If I have the case like this: 1 1 2 2 2 2 3 3 3 4 5 5 And I want to add one representative of each number group (e.i. 1+2+3+4+5)

Thanks in advance

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asked 04 Jan '18, 11:57

beka
185●8●34
accept rate: 6%

3 Answers:

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Hi Beka,
Sorry, you are right, the expression won't work in this case.
We will add an extra custom math:sum function that can be used in this case, it will be available in version 3.21 of Collect (it will be released next week).
Thanks again,
Open Foris Team

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answered 05 Jan '18, 14:39

Stefano (OF) ♦♦
4.7k●1●9
accept rate: 20%

Thank you very much. I tried expression like this: sum(idm:distinct-values(parent()/tree/sum_basal_area1))

And after preview, when I press "tree" Entity, the error message appears.

https://drive.google.com/drive/folders/1FUcehn5Js3LBH3w-gG9876MI-S8Yq4DM?usp=sharing

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answered 05 Jan '18, 14:00

beka
185●8●34
accept rate: 6%

Hi Beka,
You can use an expression like this:
sum(idm:distinct-values(list_of_values))
where list_of_values can be provided as a multiple attribute or as an attribute inside a multiple entity, so your final expression can be:
sum(idm:distinct-values(entity_name/attribute_name))

Many thanks,
Open Foris Team

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answered 05 Jan '18, 12:06

Stefano (OF) ♦♦
4.7k●1●9
accept rate: 20%

Thank you very much. I tried expression like this: sum(idm:distinct-values(parent()/tree/sum_basal_area1))

And after preview, when I press "tree" Entity, the error message appears.

https://drive.google.com/drive/folders/1FUcehn5Js3LBH3w-gG9876MI-S8Yq4DM?usp=sharing

(05 Jan '18, 13:59) beka

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question asked: 04 Jan '18, 11:57

question was seen: 2,631 times

last updated: 05 Jan '18, 14:39

how to sum up the numbers from a group

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