onal matrix</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;00045 Mass=matrix(QQ,Number\_of\_storeys,Number\_of\_storeys)</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;00046 for i in range(Number\_of\_storeys):</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;00047     for j in range(Number\_of\_storeys):</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;00048       