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So I've read this article for a project im working on:   

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4625080/pdf/fnins-09Ortiz-00416.pdfCataln: Cardinality as a highly descriptive feature in myoelectric pattern recognition for decoding motor volition, Chalmers Uni, published in "Frontiers in Neuroscience", 2015

They use cardinality in pattern recognition and claim that it is "highly descriptive". 

I can't understand how they have used it or why it would be of any use, if my understanding of cardinality as simply a measure of the size of dataset is correct. Can anyone explain to me what they mean and how they have used cardinality?

So I've read this article for a project im working on:  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4625080/pdf/fnins-09-00416.pdf

They use cardinality in pattern recognition and claim that it is "highly descriptive". I can't understand how they have used it or why it would be of any use, if my understanding of cardinality as simply a measure of the size of dataset is correct. Can anyone explain to me what they mean and how they have used cardinality?

So I've read this article for a project im working on: 

Ortiz-Cataln: Cardinality as a highly descriptive feature in myoelectric pattern recognition for decoding motor volition, Chalmers Uni, published in "Frontiers in Neuroscience", 2015

They use cardinality in pattern recognition and claim that it is "highly descriptive". 

I can't understand how they have used it or why it would be of any use, if my understanding of cardinality as simply a measure of the size of dataset is correct. Can anyone explain to me what they mean and how they have used cardinality?

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Question regarding using cardinality in pattern recognition

So I've read this article for a project im working on: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4625080/pdf/fnins-09-00416.pdf

They use cardinality in pattern recognition and claim that it is "highly descriptive". I can't understand how they have used it or why it would be of any use, if my understanding of cardinality as simply a measure of the size of dataset is correct. Can anyone explain to me what they mean and how they have used cardinality?