mahal function

when i am using mahal(Y,X) function it is giving error "Undefined function or method 'qr' for input arguments of type 'uint8'." when i examined mahal.h it is using [Q,R] = qr(C,0); at 49th line which is not defined in matlab. so what ot do for this error. Whether there is an option to get mahalanobis distance of the current color value at each pixel from the background model of that pixel. plz help me Thanks

Answer 1

[Oleg Komarov]

Try

mahal(double(x),double(y))

[Xi Chen]

not working ds = mahal(double([X Y]), double([X Y])); Undefined function 'mahal' for input arguments of type 'double'