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| <div class="tex2jax_ignore mathjax_ignore section" id="logarithmic-functions"> |
| <h1>Logarithmic Functions<a class="headerlink" href="#logarithmic-functions" title="Permalink to this headline">¶</a></h1> |
| <div class="section" id="e"> |
| <h2>e<a class="headerlink" href="#e" title="Permalink to this headline">¶</a></h2> |
| <p>e() returns the base of the natural logarithm, e.</p> |
| <p>Syntax:e()</p> |
| <p>Returns:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">An</span> <span class="n">agtype</span> <span class="nb">float</span><span class="o">.</span> |
| </pre></div> |
| </div> |
| <p>Query</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span>SELECT * |
| FROM cypher('graph_name', $$ |
| RETURN e() |
| $$) as (e agtype); |
| </pre></div> |
| </div> |
| <p>Results</p> |
| <table> |
| <tr> |
| <td>e |
| </td> |
| </tr> |
| <tr> |
| <td> 2.71828182845905 |
| </td> |
| </tr> |
| <tr> |
| <td>1 row(s) returned |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="section" id="sqrt"> |
| <h2>sqrt<a class="headerlink" href="#sqrt" title="Permalink to this headline">¶</a></h2> |
| <p>sqrt() returns the square root of a number.</p> |
| <p>Syntax:sqrt(expression)</p> |
| <p>Returns:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">An</span> <span class="n">agtype</span> <span class="nb">float</span><span class="o">.</span> |
| </pre></div> |
| </div> |
| <p>Query</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span>SELECT * |
| FROM cypher('graph_name', $$ |
| RETURN sqrt(144) |
| $$) as (results agtype); |
| </pre></div> |
| </div> |
| <p>Results</p> |
| <table> |
| <tr> |
| <td>results |
| </td> |
| </tr> |
| <tr> |
| <td>12 |
| </td> |
| </tr> |
| <tr> |
| <td>1 row(s) returned |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="section" id="exp"> |
| <h2>exp<a class="headerlink" href="#exp" title="Permalink to this headline">¶</a></h2> |
| <p>exp() returns e^n, where e is the base of the natural logarithm, and n is the value of the argument expression.</p> |
| <p>Syntax: <code class="docutils literal notranslate"><span class="pre">e(expression)</span></code></p> |
| <p>Returns:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">An</span> <span class="n">agtype</span> <span class="n">Float</span><span class="o">.</span> |
| </pre></div> |
| </div> |
| <p>Arguments:</p> |
| <table> |
| <tr> |
| <td>Name |
| </td> |
| <td>Description |
| </td> |
| </tr> |
| <tr> |
| <td>expression |
| </td> |
| <td>An agtype number expression |
| </td> |
| </tr> |
| </table> |
| <p>Considerations:</p> |
| <ul class="simple"> |
| <li><p>exp(null) returns null.</p></li> |
| </ul> |
| <p>Query:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span>SELECT * |
| FROM cypher('graph_name', $$ |
| RETURN e(2) |
| $$) as (e agtype); |
| </pre></div> |
| </div> |
| <p>e to the power of 2 is returned.</p> |
| <p>Result:</p> |
| <table> |
| <tr> |
| <td>e |
| </td> |
| </tr> |
| <tr> |
| <td>7.38905609893065 |
| </td> |
| </tr> |
| <tr> |
| <td>1 row(s) returned |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="section" id="log"> |
| <h2>log<a class="headerlink" href="#log" title="Permalink to this headline">¶</a></h2> |
| <p>log() returns the natural logarithm of a number.</p> |
| <p>Syntax:<code class="docutils literal notranslate"><span class="pre">log(expression)</span></code></p> |
| <p>Returns:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">An</span> <span class="n">agtype</span> <span class="n">Float</span><span class="o">.</span> |
| </pre></div> |
| </div> |
| <p>Arguments:</p> |
| <table> |
| <tr> |
| <td>Name |
| </td> |
| <td>Description |
| </td> |
| </tr> |
| <tr> |
| <td>expression |
| </td> |
| <td>An agtype number expression |
| </td> |
| </tr> |
| </table> |
| <p>Considerations:</p> |
| <ul class="simple"> |
| <li><p>log(null) returns null.</p></li> |
| <li><p>log(0) returns null.</p></li> |
| </ul> |
| <p>Query:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span>SELECT * |
| FROM cypher('graph_name', $$ |
| RETURN log(27) |
| $$) as (natural_logarithm agtype); |
| </pre></div> |
| </div> |
| <p>The natural logarithm of 27 is returned.</p> |
| <p>Result:</p> |
| <table> |
| <tr> |
| <td>natural_logarithm |
| </td> |
| </tr> |
| <tr> |
| <td>3.295836866004329 |
| </td> |
| </tr> |
| <tr> |
| <td>1 row(s) returned |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="section" id="log10"> |
| <h2>log10<a class="headerlink" href="#log10" title="Permalink to this headline">¶</a></h2> |
| <p>log10() returns the common logarithm (base 10) of a number.</p> |
| <p>Syntax:<code class="docutils literal notranslate"><span class="pre">log10(expression)</span></code></p> |
| <p>Returns:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">An</span> <span class="n">agtype</span> <span class="n">Float</span><span class="o">.</span> |
| </pre></div> |
| </div> |
| <p>Arguments:</p> |
| <table> |
| <tr> |
| <td>Name |
| </td> |
| <td>Description |
| </td> |
| </tr> |
| <tr> |
| <td>expression |
| </td> |
| <td>An agtype number expression |
| </td> |
| </tr> |
| </table> |
| <p>Considerations:</p> |
| <ul class="simple"> |
| <li><p>log10(null) returns null.</p></li> |
| <li><p>log10(0) returns null.</p></li> |
| </ul> |
| <p>Query:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span>SELECT * |
| FROM cypher('graph_name', $$ |
| RETURN log(27) |
| $$) as (natural_logarithm agtype); |
| </pre></div> |
| </div> |
| <p>The common logarithm of 27 is returned.</p> |
| <p>Result:</p> |
| <table> |
| <tr> |
| <td>natural_logarithm |
| </td> |
| </tr> |
| <tr> |
| <td>1.4313637641589874 |
| </td> |
| </tr> |
| <tr> |
| <td>1 row(s) returned |
| </td> |
| </tr> |
| </table> |
| </div> |
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