I'm training an activity classifier with CreateML and when I add samples to the Preview tab, the length of the sample it displays does not match its actual length.
I have set prediction window size to 15 and sample rate to 10. The activity is roughly 1.5 seconds.
When I put a 1.49 second sample into preview, it says it is 00:00.06 seconds:
and when I put a 12.91 second sample into preview, it says it is 00:00.52 seconds:
Here is the code I am using to print out sensor data in csv format:
if motionManager.isDeviceMotionAvailable {
motionManager.deviceMotionUpdateInterval = 0.1
motionManager.startDeviceMotionUpdates(to: .main) { data, error in
guard let data = data, let startTime = self.startTime else { return }
let timestamp = Date().timeIntervalSince(startTime)
let xAcc = data.userAcceleration.x
let yAcc = data.userAcceleration.y
let zAcc = data.userAcceleration.z
let xRotRate = data.rotationRate.x
let yRotRate = data.rotationRate.y
let zRotRate = data.rotationRate.z
let roll = data.attitude.roll
let pitch = data.attitude.pitch
let yaw = data.attitude.yaw
let row = "\(timestamp),\(xAcc),\(yAcc),\(zAcc),\(xRotRate),\(yRotRate),\(zRotRate),\(roll),\(pitch),\(yaw)"
print(row)
}
}
And here is the data for the 1.49 second sample mentioned above:
ehertel
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