[log, timestamp]
= angvellog(m)
returns the angular velocity log, where m is the name of
the mobiledev object that acquires the sensor data,
log is an m-by-3 matrix containing
angular velocity data points, and timestamp is an
m-by-1 vector of timestamps.
Get Logged Angular Velocity Data from Apple iOS Sensor
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. If you have not, see Install MATLAB Mobile on Your Apple iOS Device.
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 mobiledev object,
m, in MATLAB.
m = mobiledev
Begin logging data by enabling the Logging
property.
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 av
contains the three data points in X,
Y, and Z rotations, in
radians per second.
See Device Orientation for a diagram showing the X,
Y, and Z axes relative to
the device.
log — Name of variable for angular velocity log data m-by-3 matrix
Name of variable for angular velocity log data, returned as an
m-by-3 matrix of data points from the Angular
Velocity sensor on the iOS device. The three data points are the
angular velocity reading in X,
Y, and Z rotations, in
radians per second.
Angular velocity is defined in relation to the
X, Y and
Z axes 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 m-by-1 vector
Name of variable for timestamp, returned as an
m-by-1 vector of timestamps from the Angular
Velocity sensor on the iOS device. Time is in seconds, relative to
the InitialTimestamp property.
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