Doubt about median
mcarballo
New Altair Community Member
Answers
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Hi @mcarballo,Are you sure that you have selected the median function and not accidentally used minimum? I just tried this myself with both TP and with a process and it delivered the mid point between the two numbers in case of even rows like in your example. See process below for an example.Hope this helps,Ingo
<div><?xml version="1.0" encoding="UTF-8"?><process version="9.1.000-BETA2"><br> <context><br> <input/><br> <output/><br> <macros/><br> </context><br> <operator activated="true" class="process" compatibility="9.1.000-BETA2" expanded="true" name="Process" origin="EXPORTED_TURBOPREP"><br> <parameter key="logverbosity" value="init"/><br> <parameter key="random_seed" value="2001"/><br> <parameter key="send_mail" value="never"/><br> <parameter key="notification_email" value=""/><br> <parameter key="process_duration_for_mail" value="30"/><br> <parameter key="encoding" value="SYSTEM"/><br> <process expanded="true"><br> <operator activated="true" class="subprocess" compatibility="9.1.000-BETA2" expanded="true" height="82" name="Subprocess (4)" width="90" x="45" y="34"><br> <process expanded="true"><br> <operator activated="true" class="retrieve" compatibility="9.1.000-BETA2" expanded="true" height="68" name="Retrieve" origin="EXPORTED_TURBOPREP" width="90" x="45" y="34"><br> <parameter key="repository_entry" value="//Samples/data/Titanic"/><br> <description align="center" color="transparent" colored="false" width="126">Loading Titanic</description><br> </operator><br> <operator activated="true" class="subprocess" compatibility="9.1.000-BETA2" expanded="true" height="82" name="Subprocess" origin="EXPORTED_TURBOPREP" width="90" x="179" y="34"><br> <process expanded="true"><br> <operator activated="true" class="nominal_to_text" compatibility="9.1.000-BETA2" expanded="true" height="82" name="Nominal to Text" origin="EXPORTED_TURBOPREP" width="90" x="45" y="34"><br> <parameter key="attribute_filter_type" value="value_type"/><br> <parameter key="attribute" value=""/><br> <parameter key="attributes" value=""/><br> <parameter key="use_except_expression" value="false"/><br> <parameter key="value_type" value="nominal"/><br> <parameter key="use_value_type_exception" value="false"/><br> <parameter key="except_value_type" value="file_path"/><br> <parameter key="block_type" value="single_value"/><br> <parameter key="use_block_type_exception" value="false"/><br> <parameter key="except_block_type" value="single_value"/><br> <parameter key="invert_selection" value="false"/><br> <parameter key="include_special_attributes" value="false"/><br> <description align="center" color="transparent" colored="false" width="126">Change all categorical columns to text</description><br> </operator><br> <operator activated="true" class="text_to_nominal" compatibility="9.1.000-BETA2" expanded="true" height="82" name="Text to Nominal" origin="EXPORTED_TURBOPREP" width="90" x="179" y="34"><br> <parameter key="attribute_filter_type" value="value_type"/><br> <parameter key="attribute" value=""/><br> <parameter key="attributes" value=""/><br> <parameter key="use_except_expression" value="false"/><br> <parameter key="value_type" value="text"/><br> <parameter key="use_value_type_exception" value="false"/><br> <parameter key="except_value_type" value="text"/><br> <parameter key="block_type" value="value_matrix"/><br> <parameter key="use_block_type_exception" value="false"/><br> <parameter key="except_block_type" value="value_matrix_row_start"/><br> <parameter key="invert_selection" value="false"/><br> <parameter key="include_special_attributes" value="false"/><br> <description align="center" color="transparent" colored="false" width="126">Change all text columns to nominal</description><br> </operator><br> <operator activated="true" class="numerical_to_real" compatibility="9.1.000-BETA2" expanded="true" height="82" name="Numerical to Real" origin="EXPORTED_TURBOPREP" width="90" x="313" y="34"><br> <parameter key="attribute_filter_type" value="value_type"/><br> <parameter key="attribute" value=""/><br> <parameter key="attributes" value=""/><br> <parameter key="use_except_expression" value="false"/><br> <parameter key="value_type" value="numeric"/><br> <parameter key="use_value_type_exception" value="false"/><br> <parameter key="except_value_type" value="real"/><br> <parameter key="block_type" value="value_series"/><br> <parameter key="use_block_type_exception" value="false"/><br> <parameter key="except_block_type" value="value_series_end"/><br> <parameter key="invert_selection" value="false"/><br> <parameter key="include_special_attributes" value="false"/><br> <description align="center" color="transparent" colored="false" width="126">Change all numerical columns to real</description><br> </operator><br> <connect from_port="in 1" to_op="Nominal to Text" to_port="example set input"/><br> <connect from_op="Nominal to Text" from_port="example set output" to_op="Text to Nominal" to_port="example set input"/><br> <connect from_op="Text to Nominal" from_port="example set output" to_op="Numerical to Real" to_port="example set input"/><br> <connect from_op="Numerical to Real" from_port="example set output" to_port="out 1"/><br> <portSpacing port="source_in 1" spacing="0"/><br> <portSpacing port="source_in 2" spacing="0"/><br> <portSpacing port="sink_out 1" spacing="0"/><br> <portSpacing port="sink_out 2" spacing="0"/><br> </process><br> <description align="center" color="transparent" colored="false" width="126">Unify column types</description><br> </operator><br> <operator activated="true" class="subprocess" compatibility="9.1.000-BETA2" expanded="true" height="82" name="Subprocess (2)" origin="EXPORTED_TURBOPREP" width="90" x="313" y="34"><br> <process expanded="true"><br> <operator activated="true" class="aggregate" compatibility="9.1.000-BETA2" expanded="true" height="82" name="Aggregate" origin="EXPORTED_TURBOPREP" width="90" x="45" y="34"><br> <parameter key="use_default_aggregation" value="false"/><br> <parameter key="attribute_filter_type" value="all"/><br> <parameter key="attribute" value=""/><br> <parameter key="attributes" value=""/><br> <parameter key="use_except_expression" value="false"/><br> <parameter key="value_type" value="attribute_value"/><br> <parameter key="use_value_type_exception" value="false"/><br> <parameter key="except_value_type" value="time"/><br> <parameter key="block_type" value="attribute_block"/><br> <parameter key="use_block_type_exception" value="false"/><br> <parameter key="except_block_type" value="value_matrix_row_start"/><br> <parameter key="invert_selection" value="false"/><br> <parameter key="include_special_attributes" value="false"/><br> <parameter key="default_aggregation_function" value="average"/><br> <list key="aggregation_attributes"><br> <parameter key="Age" value="maximum"/><br> </list><br> <parameter key="group_by_attributes" value="Survived"/><br> <parameter key="count_all_combinations" value="false"/><br> <parameter key="only_distinct" value="false"/><br> <parameter key="ignore_missings" value="true"/><br> </operator><br> <connect from_port="in 1" to_op="Aggregate" to_port="example set input"/><br> <connect from_op="Aggregate" from_port="example set output" to_port="out 1"/><br> <portSpacing port="source_in 1" spacing="0"/><br> <portSpacing port="source_in 2" spacing="0"/><br> <portSpacing port="sink_out 1" spacing="0"/><br> <portSpacing port="sink_out 2" spacing="0"/><br> </process><br> <description align="center" color="transparent" colored="false" width="126">Aggregate Age grouped by Survived</description><br> </operator><br> <connect from_op="Retrieve" from_port="output" to_op="Subprocess" to_port="in 1"/><br> <connect from_op="Subprocess" from_port="out 1" to_op="Subprocess (2)" to_port="in 1"/><br> <connect from_op="Subprocess (2)" from_port="out 1" to_port="out 1"/><br> <portSpacing port="source_in 1" spacing="0"/><br> <portSpacing port="sink_out 1" spacing="0"/><br> <portSpacing port="sink_out 2" spacing="0"/><br> </process><br> <description align="center" color="transparent" colored="false" width="126">Create data with two rows only...</description><br> </operator><br> <operator activated="true" class="subprocess" compatibility="9.1.000-BETA2" expanded="true" height="82" name="Subprocess (3)" origin="EXPORTED_TURBOPREP" width="90" x="179" y="34"><br> <process expanded="true"><br> <operator activated="true" class="aggregate" compatibility="9.1.000-BETA2" expanded="true" height="82" name="Aggregate (2)" origin="EXPORTED_TURBOPREP" width="90" x="45" y="34"><br> <parameter key="use_default_aggregation" value="false"/><br> <parameter key="attribute_filter_type" value="all"/><br> <parameter key="attribute" value=""/><br> <parameter key="attributes" value=""/><br> <parameter key="use_except_expression" value="false"/><br> <parameter key="value_type" value="attribute_value"/><br> <parameter key="use_value_type_exception" value="false"/><br> <parameter key="except_value_type" value="time"/><br> <parameter key="block_type" value="attribute_block"/><br> <parameter key="use_block_type_exception" value="false"/><br> <parameter key="except_block_type" value="value_matrix_row_start"/><br> <parameter key="invert_selection" value="false"/><br> <parameter key="include_special_attributes" value="false"/><br> <parameter key="default_aggregation_function" value="average"/><br> <list key="aggregation_attributes"><br> <parameter key="maximum(Age)" value="median"/><br> </list><br> <parameter key="group_by_attributes" value=""/><br> <parameter key="count_all_combinations" value="false"/><br> <parameter key="only_distinct" value="false"/><br> <parameter key="ignore_missings" value="true"/><br> </operator><br> <connect from_port="in 1" to_op="Aggregate (2)" to_port="example set input"/><br> <connect from_op="Aggregate (2)" from_port="example set output" to_port="out 1"/><br> <portSpacing port="source_in 1" spacing="0"/><br> <portSpacing port="source_in 2" spacing="0"/><br> <portSpacing port="sink_out 1" spacing="0"/><br> <portSpacing port="sink_out 2" spacing="0"/><br> </process><br> <description align="center" color="transparent" colored="false" width="126">Aggregate (Median)</description><br> </operator><br> <connect from_op="Subprocess (4)" from_port="out 1" to_op="Subprocess (3)" to_port="in 1"/><br> <connect from_op="Subprocess (3)" from_port="out 1" to_port="result 1"/><br> <portSpacing port="source_input 1" spacing="0"/><br> <portSpacing port="sink_result 1" spacing="0"/><br> <portSpacing port="sink_result 2" spacing="0"/><br> </process><br> </operator><br></process><br><br></div>
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