<div>Dear Bob:</div>
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<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div> as for my third question : the attached picture can explain.</div></blockquote>
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<div>It seems that QE does not arrange phonon eigenvalue according to their symmetry.</div>
<div>You can deal with it by hand. For example, you can re-draw the picture in origin or gunplot:)</div>
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<p>____________________________________<br>Hui Wang<br>School of physics, Nankai University, Tianjin, China </p>