error in isempty function

Question

I have a mistake in this role isempty in Matlab, I need when it is empty through a matrix to make the condition after the if isempty:

function bn_hat = my_descodificador_Hamming_v2(rn,N,H_Ham,n_cyc,k_cyc,simb_alfa)

rn      = reshape(rn,n_cyc,N/k_cyc)';

bn_til      = rem(rn*H_Ham',2);

sn_til      = bi2de(bn_til,'right-msb')';
cn_hat      = rn';
pos         = find(sn_til>0);
pos_erro    = nansum(simb_alfa(sn_til(pos)),1);

if isempty(pos_erro,[])

    cn_hat(pos_erro+n_cyc*(pos-1)) =  not( cn_hat(pos_erro+n_cyc) );

end

bn_hat      = cn_hat(k_cyc:end,:)';
bn_hat      = reshape(bn_hat',1,[]);

The mistake you make is this::

Eb/No = +0 dB :: errors = Error using isempty Too Many input Arguments.

Error in my_decode_Hamming_v2 (line 11) if isempty(pos_error,[])

Error in sim_FSK_incoherent (line 56) bn_hat = my_descodificador_Hamming_v2(cn_hat,N,H_Ham,n_cyc,k_cyc,simb_alfa);

Answer 1

The function isempty accepts only one parameter, but its code has two.

If you use

if isempty(pos_erro) 

must solve.