Changepoints

Last week I attended a talk given by Professor Idris Eckley named “Making Sense of Sensor Data”. One of the main areas I see sensors being used every day is my phone telling me how much I’ve walked. There is quite a few problems in sensor data. I’ll look at two of them here namely the changepoints in the data and the frequency at which we observe data Changepoints The first is quite simple, suppose we observe a long uni-variate time series of some movement measure in a sensor. »