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Karlstad University

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24 Apr 2013 Learning the Unscented Kalman Filter An implementation of Unscented Kalman Filter for nonlinear state estimation. Author: Yi Cao

Thank you Prof. Yi Cao.

I have a problem at this point:
X=sigma(x,P,c) %sigma points around x

It keeps saying:

"Index exceeds matrix dimensions.
Error in sigma (line 97)
a=varargin{1}; b=varargin{2}; c=varargin{3}; d=varargin{4};"

when i run this instead:
X=sigma(x,P,c,[],1), it says:

"Error using sigma (line 107)
The A matrix must be square"

Please does anyone have a solution to this? I can't seem to get past this point.

Thank you.

27 Mar 2013 Learning the Extended Kalman Filter An implementation of Extended Kalman Filter for nonlinear state estimation. Author: Yi Cao

Hi guys, i need some help please. I Use Matlab R2012b to try to run the code/example. I usually copy the whole code,place a new editor,highlight the example,right click,left click 'evaluate selection'(as i don't see any 'run').But on Matlab's command window, it shows the highlighted example and says "Undefined function 'ekf' for input arguments of type 'function_handle'." Please who knows what could be wrong? What could i be doing wrong? Thank you. John

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