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<h1 class='fqn'><span class='in-band'>Struct <a href='../../index.html'>rand</a>::<wbr><a href='../index.html'>distributions</a>::<wbr><a href='index.html'>exponential</a>::<wbr><a class='struct' href=''>Exp</a></span><span class='out-of-band'><span id='render-detail'>
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                       [<span class='inner'>&#x2212;</span>]
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               </span><a id='src-488' class='srclink' href='../../../src/rand/distributions/exponential.rs.html#75-78' title='goto source code'>[src]</a></span></h1>
<pre class='rust struct'>pub struct Exp {
    // some fields omitted
}</pre><div class='docblock'><p>The exponential distribution <code>Exp(lambda)</code>.</p>

<p>This distribution has density function: <code>f(x) = lambda * exp(-lambda * x)</code> for <code>x &gt; 0</code>.</p>

<h1 id='example' class='section-header'><a href='#example'>Example</a></h1>
<pre class='rust rust-example-rendered'>
<span class='kw'>use</span> <span class='ident'>rand</span>::<span class='ident'>distributions</span>::{<span class='ident'>Exp</span>, <span class='ident'>IndependentSample</span>};

<span class='kw'>let</span> <span class='ident'>exp</span> <span class='op'>=</span> <span class='ident'>Exp</span>::<span class='ident'>new</span>(<span class='number'>2.0</span>);
<span class='kw'>let</span> <span class='ident'>v</span> <span class='op'>=</span> <span class='ident'>exp</span>.<span class='ident'>ind_sample</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>rand</span>::<span class='ident'>thread_rng</span>());
<span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>&quot;{} is from a Exp(2) distribution&quot;</span>, <span class='ident'>v</span>);</pre>
</div><h2 id='methods'>Methods</h2><h3 class='impl'><span class='in-band'><code>impl <a class='struct' href='../../../rand/distributions/exponential/struct.Exp.html' title='rand::distributions::exponential::Exp'>Exp</a></code></span><span class='out-of-band'><div class='ghost'></div><a id='src-495' class='srclink' href='../../../src/rand/distributions/exponential.rs.html#80-87' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.new' class='method'><code>fn <a href='#method.new' class='fnname'>new</a>(lambda: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.f64.html'>f64</a>) -&gt; <a class='struct' href='../../../rand/distributions/exponential/struct.Exp.html' title='rand::distributions::exponential::Exp'>Exp</a></code></h4>
<div class='docblock'><p>Construct a new <code>Exp</code> with the given shape parameter
<code>lambda</code>. Panics if <code>lambda &lt;= 0</code>.</p>
</div></div><h2 id='implementations'>Trait Implementations</h2><h3 class='impl'><span class='in-band'><code>impl <a class='trait' href='../../../rand/distributions/trait.Sample.html' title='rand::distributions::Sample'>Sample</a>&lt;<a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.f64.html'>f64</a>&gt; for <a class='struct' href='../../../rand/distributions/exponential/struct.Exp.html' title='rand::distributions::exponential::Exp'>Exp</a></code></span><span class='out-of-band'><div class='ghost'></div><a id='src-499' class='srclink' href='../../../src/rand/distributions/exponential.rs.html#89-91' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.sample' class='method'><code>fn <a href='../../../rand/distributions/trait.Sample.html#tymethod.sample' class='fnname'>sample</a>&lt;R: <a class='trait' href='../../../rand/trait.Rng.html' title='rand::Rng'>Rng</a>&gt;(&amp;mut self, rng: &amp;mut R) -&gt; <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.f64.html'>f64</a></code></h4>
<div class='docblock'><p>Generate a random value of <code>Support</code>, using <code>rng</code> as the source of randomness. <a href="../../../rand/distributions/trait.Sample.html#tymethod.sample">Read more</a></p>
</div></div><h3 class='impl'><span class='in-band'><code>impl <a class='trait' href='../../../rand/distributions/trait.IndependentSample.html' title='rand::distributions::IndependentSample'>IndependentSample</a>&lt;<a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.f64.html'>f64</a>&gt; for <a class='struct' href='../../../rand/distributions/exponential/struct.Exp.html' title='rand::distributions::exponential::Exp'>Exp</a></code></span><span class='out-of-band'><div class='ghost'></div><a id='src-504' class='srclink' href='../../../src/rand/distributions/exponential.rs.html#92-97' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.ind_sample' class='method'><code>fn <a href='../../../rand/distributions/trait.IndependentSample.html#tymethod.ind_sample' class='fnname'>ind_sample</a>&lt;R: <a class='trait' href='../../../rand/trait.Rng.html' title='rand::Rng'>Rng</a>&gt;(&amp;self, rng: &amp;mut R) -&gt; <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.f64.html'>f64</a></code></h4>
<div class='docblock'><p>Generate a random value.</p>
</div></div><h3 id='derived_implementations'>Derived Implementations </h3><h3 class='impl'><span class='in-band'><code>impl <a class='trait' href='https://doc.rust-lang.org/nightly/core/marker/trait.Copy.html' title='core::marker::Copy'>Copy</a> for <a class='struct' href='../../../rand/distributions/exponential/struct.Exp.html' title='rand::distributions::exponential::Exp'>Exp</a></code></span><span class='out-of-band'><div class='ghost'></div><a id='src-490' class='srclink' href='../../../src/rand/distributions/exponential.rs.html#74' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'></div><h3 class='impl'><span class='in-band'><code>impl <a class='trait' href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html' title='core::clone::Clone'>Clone</a> for <a class='struct' href='../../../rand/distributions/exponential/struct.Exp.html' title='rand::distributions::exponential::Exp'>Exp</a></code></span><span class='out-of-band'><div class='ghost'></div><a id='src-491' class='srclink' href='../../../src/rand/distributions/exponential.rs.html#74' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.clone' class='method'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&amp;self) -&gt; <a class='struct' href='../../../rand/distributions/exponential/struct.Exp.html' title='rand::distributions::exponential::Exp'>Exp</a></code></h4>
<div class='docblock'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
</div><h4 id='method.clone_from' class='method'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&amp;mut self, source: &amp;Self)</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></h4>
<div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
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