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<div class="moz-cite-prefix">Le 24/11/2019 à 19:53, fujimoto2005 a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:1574621580901-0.post@n3.nabble.com">
<pre class="moz-quote-pre" wrap="">Is it posible to get a 2-dimension matrix y(j,k) =Σ_i x(i,j,k) from 3
dimension hyper- matrix x(i,j,k) without using k-loop?
If there is such a way, please teach me.</pre>
</blockquote>
<p><br>
</p>
<p><font size="-1"><tt>--> h = grand(4,3,2,"uin",0,3)</tt><tt><br>
</tt><tt> h = </tt><tt><br>
</tt><tt>(:,:,1)</tt><tt><br>
</tt><tt> 0. 0. 2.</tt><tt><br>
</tt><tt> 2. 3. 3.</tt><tt><br>
</tt><tt> 2. 1. 3.</tt><tt><br>
</tt><tt> 1. 1. 1.</tt><tt><br>
</tt><tt>(:,:,2)</tt><tt><br>
</tt><tt> 0. 3. 1.</tt><tt><br>
</tt><tt> 2. 0. 1.</tt><tt><br>
</tt><tt> 3. 1. 3.</tt><tt><br>
</tt><tt> 0. 2. 3.</tt><tt><br>
</tt><tt><br>
</tt><tt>--> matrix(sum(h,1),-1,size(h,2))</tt><tt><br>
</tt><tt> ans =</tt><tt><br>
</tt><tt> 5. 9. 6.</tt><tt><br>
</tt><tt> 5. 5. 8.</tt><tt><br>
</tt></font><br>
Regards</p>
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