function errir in symbolic

[Mankin, Erik]

Hello,

 

I installed octave 4.4.0 and then the package symbolic version 2.7.0

 

Running the following code

 

 

syms xx m

solve(xx == 2*xx + 6, xx)

 

bb=[-2, -1, 0, 1, 2];

cc=polyout(bb,'m')

cc

[c9, t9] = coeffs(cc)

 

The function solve (beeing in the package symbolic) works fine, whereas

Coeffs does not work:

error: 'coeffs' undefined near line

 

Thanks in advance

Erik