English Science Mathematics & Statistics Data Analysis

• Derived collectives: Peaks and troughs, positive and negative ranges and range pairs, positive and negative level crossings.

I am translating a users guide about a data analysis software. This is one of the feature mentionned in the "counting procedures" chapter.

I understand every single word in the sentence, I do know what are peaks, range, (in Data Analysis) .... But I am unable to catch what they mean by "Derived Collectives"

Does it mean something like: Calculated dataset key values?

Thank you in advance for your help