how to find spectrogram of EEG motor imagery signal which is bandpassed between 8-30 HZ with sampling frequency.250.s can you give a code to find spectrogram of EEG ?

x=train_data('1,:,1'); Fs=250;

[Fatemeh Yousef Zadeh]

[B,F,T] = specgram(A,NFFT,Fs,Window,Noverlap);