MATLAB: How to convert ascii data to floating point

ascii to floating point

Hi guys.
i have a problem with my project and i need your help.
the problem is about data type conversion.
i use an app to send gravity_sensor data via UDP on my phone.
This is a desription of the app i use.
%%%%%%%%%%%%%
USAGE INSTRUCTIONS:
The data is stored within the app as a float array. See the format below.
Format: [ X Acceleration, Y Acceleration, Z Acceleration, X Gravity, Y Gravity, Z Gravity, X Rotation Rate, Y Rotation Rate, Z Rotation Rate, X Orientation (Azimuth), Y Orientation (Pitch), Z Orientation (Roll), deprecated, deprecated, Ambient Light, Proximity, Keyboard Buttons 1 – 8 ]
%%%%%%%%%%%%%
and, i wrote these lines and get result in MATLAB.
 fopen(UDPComIn);
 csvdata=fscanf(UDPComIn)
 ans =
 KKun
this is the problem. what i wanted was floating point data like (-0.001). but, the result data type looked like ASCII code type.
so here are my question.
1) Is there any method to extract floating point data from a float array in UDP ?
2) if not, how can i convert ascii data to floating point?
i will wait your reply soon

Best Answer

The default for fscanf on UDP objects is %c format, but the packets do not contain text. You should be using fread() on the UDP object, specifying '*float' . You might also need to specify the endian order; see https://www.mathworks.com/help/instrument/byteorder.html
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