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FIX norm_1 so it is implemented as sum(abs(()) as documented and correctly defined

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svn path=/trunk/boost/libs/numeric/ublas/; revision=31175
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Michael Stevens
2005-10-02 12:35:36 +00:00
parent a406abd800
commit 90b0cee447
1 changed files with 11 additions and 5 deletions
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doc/overview.htm
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@@ -284,24 +284,30 @@ matrices.</p>
<th align="left">Comment</th>
</tr>
<tr>
<td><code>_asum</code></td>
<td><code>sasum</code> OR <code>dasum</code></td>
<td><code>norm_1 (x)</code></td>
<td><em>sum |x</em><sub><em>i</em></sub><em>|</em></td>
<td>Computes the sum norm of a vector.</td>
<td><em>sum x<sub>i</sub></em></td>
<td>Computes the <em>l<sub>1</sub></em> (sum) norm of a real vector.</td>
</tr>
<tr>
<td><code>scasum</code> OR <code>dzasum</code></td>
<td><em>no equivilent</em></td>
<td><em>sum re(x<sub>i</sub>) + sum im(x<sub>i</sub>)</em></td>
<td>Computes the sum of elements of a complex vector.</td>
</tr>
<tr>
<td><code>_nrm2</code></td>
<td><code>norm_2 (x)</code></td>
<td><em>sqrt (sum
|x</em><sub><em>i</em></sub>|<sup><em>2</em></sup> <em>)</em></td>
<td>Computes the euclidean norm of a vector.</td>
<td>Computes the <em>l<sub>inf</sub></em> (euclidean) norm of a vector.</td>
</tr>
<tr>
<td><code>i_amax</code></td>
<td><code>norm_inf (x)<br />
norm_inf_index (x)</code></td>
<td><em>max |x</em><sub><em>i</em></sub><em>|</em></td>
<td>Computes the maximum norm of a vector.<br />
<td>Computes the <em>l<sub>2</sub></em> (maximum) norm of a vector.<br />
BLAS computes the index of the first element having this
value.</td>
</tr>