Towards a Portable Model to Discriminate Activity Clusters from Accelerometer Data.
Petra Jones, Evgeny M Mirkes, Tom Yates, Charlotte L Edwardson, Mike Catt, Melanie J Davies, Kamlesh Khunti, Alex V Rowlands
Sensors | Published : 2019
Few methods for classifying physical activity from accelerometer data have been tested using an independent dataset for cross-validation, and even fewer using multiple independent datasets. The aim of this study was to evaluate whether unsupervised machine learning was a viable approach for the development of a reusable clustering model that was generalisable to independent datasets. We used two labelled adult laboratory datasets to generate a k-means clustering model. To assess its generalised application, we applied the stored clustering model to three independent labelled datasets: two laboratory and one free-living. Based on the development labelled data, the ten clusters were collapsed ..View full abstract