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| <div class="section" id="operation-node"> |
| <h1>Operation Node<a class="headerlink" href="#operation-node" title="Permalink to this headline">¶</a></h1> |
| <blockquote> |
| <div></div></blockquote> |
| <p>An <code class="docutils literal notranslate"><span class="pre">OperationNode</span></code> represents an operation that executes in SystemDS. |
| Most methods are overloaded for <code class="docutils literal notranslate"><span class="pre">OperationNode</span></code>. |
| This means that they return an <code class="docutils literal notranslate"><span class="pre">OperationNode</span></code>.</p> |
| <p>To get the result from an <code class="docutils literal notranslate"><span class="pre">OperationNode</span></code> you simply call <code class="docutils literal notranslate"><span class="pre">.compute()</span></code> on it, thereby getting the numpy equivalent result. |
| Even comparisons like <code class="docutils literal notranslate"><span class="pre">__eq__</span></code>, <code class="docutils literal notranslate"><span class="pre">__lt__</span></code> etc. return <code class="docutils literal notranslate"><span class="pre">OperationNode</span></code>.</p> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>All operations are lazily evaluated, meaning before calling <code class="docutils literal notranslate"><span class="pre">.compute()</span></code> nothing will be executed in SystemDS. |
| Therefore errors will not immediately be recognized while constructing an sequence of operators.</p> |
| </div> |
| <dl class="py class"> |
| <dt id="systemds.operator.OperationNode"> |
| <em class="property">class </em><code class="sig-prename descclassname">systemds.operator.</code><code class="sig-name descname">OperationNode</code><span class="sig-paren">(</span><em class="sig-param">sds_context: SystemDSContext</em>, <em class="sig-param">operation: str</em>, <em class="sig-param">unnamed_input_nodes: Iterable[Union[DAGNode</em>, <em class="sig-param">str</em>, <em class="sig-param">int</em>, <em class="sig-param">float</em>, <em class="sig-param">bool]] = None</em>, <em class="sig-param">named_input_nodes: Dict[str</em>, <em class="sig-param">Union[DAGNode</em>, <em class="sig-param">str</em>, <em class="sig-param">int</em>, <em class="sig-param">float</em>, <em class="sig-param">bool]] = None</em>, <em class="sig-param">output_type: systemds.script_building.dag.OutputType = <OutputType.MATRIX: 1></em>, <em class="sig-param">is_python_local_data: bool = False</em>, <em class="sig-param">number_of_outputs=1</em>, <em class="sig-param">output_types: Iterable[systemds.script_building.dag.OutputType] = None</em><span class="sig-paren">)</span><a class="headerlink" href="#systemds.operator.OperationNode" title="Permalink to this definition">¶</a></dt> |
| <dd><p>A Node representing an operation in SystemDS</p> |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.__init__"> |
| <code class="sig-name descname">__init__</code><span class="sig-paren">(</span><em class="sig-param">sds_context: SystemDSContext</em>, <em class="sig-param">operation: str</em>, <em class="sig-param">unnamed_input_nodes: Iterable[Union[DAGNode</em>, <em class="sig-param">str</em>, <em class="sig-param">int</em>, <em class="sig-param">float</em>, <em class="sig-param">bool]] = None</em>, <em class="sig-param">named_input_nodes: Dict[str</em>, <em class="sig-param">Union[DAGNode</em>, <em class="sig-param">str</em>, <em class="sig-param">int</em>, <em class="sig-param">float</em>, <em class="sig-param">bool]] = None</em>, <em class="sig-param">output_type: systemds.script_building.dag.OutputType = <OutputType.MATRIX: 1></em>, <em class="sig-param">is_python_local_data: bool = False</em>, <em class="sig-param">number_of_outputs=1</em>, <em class="sig-param">output_types: Iterable[systemds.script_building.dag.OutputType] = None</em><span class="sig-paren">)</span><a class="headerlink" href="#systemds.operator.OperationNode.__init__" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Create general <cite>OperationNode</cite></p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>sds_context</strong> – The SystemDS context for performing the operations</p></li> |
| <li><p><strong>operation</strong> – The name of the DML function to execute</p></li> |
| <li><p><strong>unnamed_input_nodes</strong> – inputs identified by their position, not name</p></li> |
| <li><p><strong>named_input_nodes</strong> – inputs with their respective parameter name</p></li> |
| <li><p><strong>output_type</strong> – type of the output in DML (double, matrix etc.)</p></li> |
| <li><p><strong>is_python_local_data</strong> – if the data is local in python e.g. Numpy arrays</p></li> |
| <li><p><strong>number_of_outputs</strong> – If set to other value than 1 then it is expected |
| that this operation node returns multiple values. If set remember to set the output_types value as well.</p></li> |
| <li><p><strong>output_types</strong> – The types of output in a multi output scenario. |
| Default is None, and means every multi output is a matrix.</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.abs"> |
| <code class="sig-name descname">abs</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.abs" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate absolute.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.acos"> |
| <code class="sig-name descname">acos</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.acos" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate arccos.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.asin"> |
| <code class="sig-name descname">asin</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.asin" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate arcsin.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.atan"> |
| <code class="sig-name descname">atan</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.atan" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate arctan.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.code_line"> |
| <code class="sig-name descname">code_line</code><span class="sig-paren">(</span><em class="sig-param"><span class="n">var_name</span><span class="p">:</span> <span class="n">str</span></em>, <em class="sig-param"><span class="n">unnamed_input_vars</span><span class="p">:</span> <span class="n">Sequence<span class="p">[</span>str<span class="p">]</span></span></em>, <em class="sig-param"><span class="n">named_input_vars</span><span class="p">:</span> <span class="n">Dict<span class="p">[</span>str<span class="p">, </span>str<span class="p">]</span></span></em><span class="sig-paren">)</span> → str<a class="headerlink" href="#systemds.operator.OperationNode.code_line" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Generates the DML code line equal to the intended action of this node.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>var_name</strong> – Name of DML-variable this nodes result should be saved in</p></li> |
| <li><p><strong>unnamed_input_vars</strong> – all strings representing the unnamed parameters</p></li> |
| <li><p><strong>named_input_vars</strong> – all strings representing the named parameters (name value pairs)</p></li> |
| </ul> |
| </dd> |
| <dt class="field-even">Returns</dt> |
| <dd class="field-even"><p>the DML code line that is equal to this operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.compute"> |
| <code class="sig-name descname">compute</code><span class="sig-paren">(</span><em class="sig-param"><span class="n">verbose</span><span class="p">:</span> <span class="n">bool</span> <span class="o">=</span> <span class="default_value">False</span></em>, <em class="sig-param"><span class="n">lineage</span><span class="p">:</span> <span class="n">bool</span> <span class="o">=</span> <span class="default_value">False</span></em><span class="sig-paren">)</span> → Union<span class="p">[</span>float<span class="p">, </span>numpy.array<span class="p">, </span>Tuple<span class="p">[</span>Union<span class="p">[</span>float<span class="p">, </span>numpy.array<span class="p">]</span><span class="p">, </span>str<span class="p">]</span><span class="p">]</span><a class="headerlink" href="#systemds.operator.OperationNode.compute" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Get result of this operation. Builds the dml script and executes it in SystemDS, before this method is called |
| all operations are only building the DAG without actually executing (lazy evaluation).</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>verbose</strong> – Can be activated to print additional information such as created DML-Script</p></li> |
| <li><p><strong>lineage</strong> – Can be activated to print lineage trace till this node</p></li> |
| </ul> |
| </dd> |
| <dt class="field-even">Returns</dt> |
| <dd class="field-even"><p>the output as an python builtin data type or numpy array</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.cos"> |
| <code class="sig-name descname">cos</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.cos" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate cos.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.cosh"> |
| <code class="sig-name descname">cosh</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.cosh" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate cos.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.get_lineage_trace"> |
| <code class="sig-name descname">get_lineage_trace</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → str<a class="headerlink" href="#systemds.operator.OperationNode.get_lineage_trace" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Get the lineage trace for this node.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p>Lineage trace</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.mean"> |
| <code class="sig-name descname">mean</code><span class="sig-paren">(</span><em class="sig-param"><span class="n">axis</span><span class="p">:</span> <span class="n">int</span> <span class="o">=</span> <span class="default_value">None</span></em><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.mean" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate mean of matrix.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><p><strong>axis</strong> – can be 0 or 1 to do either row or column means</p> |
| </dd> |
| <dt class="field-even">Returns</dt> |
| <dd class="field-even"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.pass_python_data_to_prepared_script"> |
| <code class="sig-name descname">pass_python_data_to_prepared_script</code><span class="sig-paren">(</span><em class="sig-param"><span class="n">jvm</span><span class="p">:</span> <span class="n">py4j.java_gateway.JVMView</span></em>, <em class="sig-param"><span class="n">var_name</span><span class="p">:</span> <span class="n">str</span></em>, <em class="sig-param"><span class="n">prepared_script</span><span class="p">:</span> <span class="n">py4j.java_gateway.JavaObject</span></em><span class="sig-paren">)</span> → None<a class="headerlink" href="#systemds.operator.OperationNode.pass_python_data_to_prepared_script" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Passes data from python to the prepared script object.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><ul class="simple"> |
| <li><p><strong>jvm</strong> – the java virtual machine object</p></li> |
| <li><p><strong>var_name</strong> – the variable name the data should get in java</p></li> |
| <li><p><strong>prepared_script</strong> – the prepared script</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.sin"> |
| <code class="sig-name descname">sin</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.sin" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate sin.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.sinh"> |
| <code class="sig-name descname">sinh</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.sinh" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate sin.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.sum"> |
| <code class="sig-name descname">sum</code><span class="sig-paren">(</span><em class="sig-param"><span class="n">axis</span><span class="p">:</span> <span class="n">int</span> <span class="o">=</span> <span class="default_value">None</span></em><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.sum" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate sum of matrix.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><p><strong>axis</strong> – can be 0 or 1 to do either row or column sums</p> |
| </dd> |
| <dt class="field-even">Returns</dt> |
| <dd class="field-even"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.tan"> |
| <code class="sig-name descname">tan</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.tan" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate tan.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.tanh"> |
| <code class="sig-name descname">tanh</code><span class="sig-paren">(</span><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.tanh" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate tan.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Returns</dt> |
| <dd class="field-odd"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| <dl class="py method"> |
| <dt id="systemds.operator.OperationNode.var"> |
| <code class="sig-name descname">var</code><span class="sig-paren">(</span><em class="sig-param"><span class="n">axis</span><span class="p">:</span> <span class="n">int</span> <span class="o">=</span> <span class="default_value">None</span></em><span class="sig-paren">)</span> → systemds.operator.operation_node.OperationNode<a class="headerlink" href="#systemds.operator.OperationNode.var" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Calculate variance of matrix.</p> |
| <dl class="field-list simple"> |
| <dt class="field-odd">Parameters</dt> |
| <dd class="field-odd"><p><strong>axis</strong> – can be 0 or 1 to do either row or column vars</p> |
| </dd> |
| <dt class="field-even">Returns</dt> |
| <dd class="field-even"><p><cite>OperationNode</cite> representing operation</p> |
| </dd> |
| </dl> |
| </dd></dl> |
| |
| </dd></dl> |
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