MATLAB: Matlab Mobile: Plot a walking path in cartesian

Question

Hi,

I am using Matlab mobile to acquire postioning data while walking along a path . Then I convert it to cartesian and plot it in 3D. I want to calculate the distance walked. Here is the code:

In Matlab Mobile: [Android]

m = mobiledev;

m.PositionSensorEnabled = 1;

m.Logging = 1;

<walk straight 10 steps>

m.Logging = 0

[lat,lon,timestamp,speed,course,alt,horizac] = poslog(m)

< convert to cartesian>

[x,y,z] = geodecticenu(lat,lon,horizac,lat(1),lon(1),horizac(1),wgs84Ellipsoid);

plot3(x,y,z)

I expect a staright path in 3D, But it is not showing that.

Kindly help.

Looking forward to your response.

Regards,

Naz

Answer 1

The entire code looks fine.Just a minor mistake in using geodeticenu function. Use geodetic2enu instead for getting the desired results.