title: scilab: adding vector to matrix
body: <p>if I want to add an element to a vector in scliab I can use <code>$+1</code> index:  </p>
  
  <pre><code>--&gt;t($+1)=rand()
   t  =
  
      0.2113249  
  
  --&gt;t($+1)=rand()
   t  =
  
      0.2113249  
      0.7560439  
  
  --&gt;t($+1)=rand()
   t  =
  
      0.2113249  
      0.7560439  
      0.0002211  
  
  --&gt;t($+1)=rand()
   t  =
  
     0.2113249  
     0.7560439  
     0.0002211  
     0.3303271  
  </code></pre>
  
  <p>So why if I want to add a row or column to an empty matrix I get a zero row or column?  </p>
  
  <pre><code>--&gt;U(:,$+1)=t
   U  =
  
      0.    0.2113249  
      0.    0.7560439  
      0.    0.0002211  
      0.    0.3303271  
  
  --&gt;U(:,$+1)=t
   U  =
  
      0.    0.2113249    0.2113249  
      0.    0.7560439    0.7560439  
      0.    0.0002211    0.0002211  
      0.    0.3303271    0.3303271  
  
  --&gt;Z($+1,:)=t'
   Z  =
  
      0.           0.           0.           0.         
      0.2113249    0.7560439    0.0002211    0.3303271  
  
  --&gt;Z($+1,:)=t'
   Z  =
  
      0.           0.           0.           0.         
      0.2113249    0.7560439    0.0002211    0.3303271  
      0.2113249    0.7560439    0.0002211    0.3303271  
  </code></pre>
  
  <p>Best regards
  Max</p>