Return logged angular velocity data from iOS sensor
[log, timestamp] = angvellog(m)
This example assumes that you have already installed and set up MATLAB® Mobile™ on your iOS device and connected it to your computer running MATLAB. For information about these steps, see Get Started with iOS Sensors.
Start MATLAB Mobile on your iOS device.
On the Sensors screen, tap the Angular Velocity sensor.
Place the device where you want to get the sensor data.
On your computer, create a
m = mobiledev
Begin logging data by enabling the
m.Logging = 1
This action starts the transmitting of data from all selected sensors. You can also start transmission by tapping the Start button in MATLAB Mobile.
Get the logged angular velocity data.
[av, t] = angvellog(m)
This returns the angular velocity log, where
the three data points in
Z rotations, in radians per second.
See Device Orientation for a diagram showing the
Z axes relative to the device.
log— Name of variable for angular velocity log data
Name of variable for angular velocity log data, returned as
an [mx3] matrix of data points from the Angular Velocity sensor on
the iOS device. The three data points are the angular velocity reading
in radians per second.
Angular velocity is defined in relation to the
and in standard right-hand rotational vector notation. If you place
the device face-up on a table, the positive X-axis extends out of
the right side of the device, positive Y-axis extends out of the top
side, and the positive Z-axis extends out of the front face of the
device. This is independent of the orientation of the device.
timestamp— Name of variable for timestamp
Name of variable for timestamp, returned as an [mx1] vector
of timestamps from the Angular Velocity sensor on the iOS device.
Time is in seconds, relative to the