dimensionality
C2CEFR level
85/100Rarity: very rare
TechnicalRegister
The number of features or variables describing each data point.
With hundreds of behavioural signals per user, the team had to reduce the dimensionality before the segmentation would run.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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