Not enough input arguments. Help me please.

Help me, i'm new to MatLab and I got this error after typing this code. Can somebody help me please and find a solution. Thanks.

    function expected_freq = feature8(data,fs)

    cutoff = 100;

    data=data/max(abs(data)); 

    b= fir1(100,2*cutoff/fs,'high',chebwin(101)); 

    data=conv(data,b); 

    t=60e-3;

    wl=2^nextpow2(t/(1/fs));

    w=hann(wl,'periodic');

    [F,T,P]=spectrogram(data,w,[],wl,fs);

    a=sum(P,1);

    temp1 = repmat(a,[],length(F));

    PMF=P./temp1;

    temp2 = repmat(F,1,length(T)); 

    freq = sum(PMF.*temp2);

    expected_freq= std(freq);

    end

>> feature8 Error using feature8 (line 3) Not enough input arguments.