title: Lowpass/Bandpass filter design in MATLAB
body: <p>For an analog communication system design in MATLAB firstly I need to do these two design:</p>
  
  <ol>
  <li><p>Design a low-pass filter <code>[slow]=lowpassfilter(s,fcut,fs)</code> which filters input signal <code>s</code> with cutoff frequency <code>fcut</code> and sampling frequency <code>fs</code> in Hertz.</p></li>
  <li><p>Design a band-pass filter <code>[sband]=bandpassfilter(s,fcutlow,fcuthigh,fs)</code> which filters input signal <code>s</code> with cutoff frequencies <code>fcutlow</code> and <code>fcuthigh</code> and sampling frequency <code>fs</code> in Hertz.</p></li>
  </ol>
  
  <p>Could you please help me?</p>