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<a href="pyspark-module.html">Package pyspark</a> ::
<a href="pyspark.mllib-module.html">Package mllib</a> ::
<a href="pyspark.mllib.linalg-module.html">Module linalg</a> ::
Class Vectors
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class Vectors</h1><p class="nomargin-top"><span class="codelink"><a href="pyspark.mllib.linalg-pysrc.html#Vectors">source code</a></span></p>
<pre class="base-tree">
object --+
|
<strong class="uidshort">Vectors</strong>
</pre>
<hr />
<p>Factory methods for working with vectors. Note that dense vectors are
simply represented as NumPy array objects, so there is no need to covert
them for use in MLlib. For sparse vectors, the factory methods in this
class create an MLlib-compatible type, or users can pass in SciPy's
<code>scipy.sparse</code> column vectors.</p>
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<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="pyspark.mllib.linalg.Vectors-class.html#sparse" class="summary-sig-name">sparse</a>(<span class="summary-sig-arg">size</span>,
<span class="summary-sig-arg">*args</span>)</span><br />
Create a sparse vector, using either a dictionary, a list of
(index, value) pairs, or two separate arrays of indices and
values (sorted by index).</td>
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<span class="codelink"><a href="pyspark.mllib.linalg-pysrc.html#Vectors.sparse">source code</a></span>
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<td><span class="summary-sig"><a href="pyspark.mllib.linalg.Vectors-class.html#dense" class="summary-sig-name">dense</a>(<span class="summary-sig-arg">elements</span>)</span><br />
Create a dense vector of 64-bit floats from a Python list.</td>
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<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
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<a name="sparse"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">sparse</span>(<span class="sig-arg">size</span>,
<span class="sig-arg">*args</span>)</span>
<br /><em class="fname">Static Method</em>
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<pre class="literalblock">
Create a sparse vector, using either a dictionary, a list of
(index, value) pairs, or two separate arrays of indices and
values (sorted by index).
@param size: Size of the vector.
@param args: Non-zero entries, as a dictionary, list of tupes,
or two sorted lists containing indices and values.
>>> print Vectors.sparse(4, {1: 1.0, 3: 5.5})
[1: 1.0, 3: 5.5]
>>> print Vectors.sparse(4, [(1, 1.0), (3, 5.5)])
[1: 1.0, 3: 5.5]
>>> print Vectors.sparse(4, [1, 3], [1.0, 5.5])
[1: 1.0, 3: 5.5]
</pre>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">dense</span>(<span class="sig-arg">elements</span>)</span>
<br /><em class="fname">Static Method</em>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="pyspark.mllib.linalg-pysrc.html#Vectors.dense">source code</a></span>
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<p>Create a dense vector of 64-bit floats from a Python list. Always
returns a NumPy array.</p>
<pre class="py-doctest">
<span class="py-prompt">>>> </span>Vectors.dense([1, 2, 3])
<span class="py-output">array([ 1., 2., 3.])</span></pre>
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