Aggregate operator applied to each subset

New Altair Community Member

May 7, 2019

Updated Nov 5, 2024 by Jocelyn

Hello everyone,

I apologize if this question has already been asked elsewhere, or if it is an obvious one. I'm still learning how to use Rapidminer

This is my problem. Let's suppose that I have a dataset looking like that (but much more different values):

Year Region Item
01 QC CCD
01 QC CCD
01 QC CS

01 ON CCD
01 ON CS

01 NB CCD
01 NB CS
--------------------------
02 QC CCD
02 QC CS
02 QC CS

02 ON CS
02 ON CS

02 NB CCD
02 NB CCD

I would like to get the relative percentage of each Item related to the Region and to the Year:

Year Region Item Proportion
01 QC CCD 66.6%
01 QC CS 33.3%

01 ON CCD 50%
01 ON CS 50%

01 NB CCD 50%
01 NB CCS 50%
-------------------------------------
02 QC CCD 33.3%
02 QC CS 66.6%

02 ON CS 100%

02 NB CCD 100%

I tried many combinations with the operators Aggregate, Loop values, Branch, etc. but I seem to constantly fail...

Do you have any suggestion?

Thanks a lot!
Sylvain

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BalazsBaranyRM

New Altair Community Member

May 7, 2019

Hi,

what you're trying to achieve is called "window functions" in SQL.

You should check out this project, it's an implementation of window functions in RapidMiner.
https://github.com/bbarany/rapidminer-windowfunctions

You can calculate groupwise sums or counts, generate the ratios, and then aggregate according to your needs.

Regards,

Balazs

SGolbert

New Altair Community Member

Accepted Answer

May 7, 2019

Hi @SylvainM

I think I managed to do what you wanted with 2 aggregations and one Join, check it out:

Image: https://us.v-cdn.net/6030995/uploads/editor/xa/x6gv4qleezhj.png

<?xml version="1.0" encoding="UTF-8"?><process version="9.2.001">
<context>
    <input/>
    <output/>
    <macros/>
</context>
<operator activated="true" class="process" compatibility="9.2.001" expanded="true" name="Process">
    <parameter key="logverbosity" value="init"/>
    <parameter key="random_seed" value="2001"/>
    <parameter key="send_mail" value="never"/>
    <parameter key="notification_email" value=""/>
    <parameter key="process_duration_for_mail" value="30"/>
    <parameter key="encoding" value="SYSTEM"/>
    <process expanded="true">
      <operator activated="true" class="python_scripting:execute_python" compatibility="9.2.000" expanded="true" height="82" name="Execute Python" width="90" x="112" y="34">
        <parameter key="script" value="import pandas

# rm_main is a mandatory function, 
# the number of arguments has to be the number of input ports (can be none)
def rm_main():
	import pandas as pd
	import random

	dt = []
	
	for i in range(100):
	    region = random.choice(['America', 'Europe', 'Asia'])
	    quartile = random.choice(range(1,5))
	    item = random.choice(['A', 'B', 'C'])
	    dt.append([region, quartile, item])
	    
	dt = pd.DataFrame(dt, columns=['region', 'quarter', 'item'])
	return dt"/>
        <parameter key="use_default_python" value="true"/>
        <parameter key="package_manager" value="conda (anaconda)"/>
      </operator>
      <operator activated="true" class="numerical_to_polynominal" compatibility="9.2.001" expanded="true" height="82" name="Numerical to Polynominal" width="90" x="246" y="34">
        <parameter key="attribute_filter_type" value="single"/>
        <parameter key="attribute" value="quarter"/>
        <parameter key="attributes" value=""/>
        <parameter key="use_except_expression" value="false"/>
        <parameter key="value_type" value="numeric"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="real"/>
        <parameter key="block_type" value="value_series"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="value_series_end"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
      </operator>
      <operator activated="true" class="order_attributes" compatibility="9.2.001" expanded="true" height="82" name="Reorder Attributes" width="90" x="380" y="34">
        <parameter key="sort_mode" value="user specified"/>
        <parameter key="attribute_ordering" value="region|quarter|item"/>
        <parameter key="use_regular_expressions" value="false"/>
        <parameter key="handle_unmatched" value="append"/>
        <parameter key="sort_direction" value="ascending"/>
      </operator>
      <operator activated="true" class="multiply" compatibility="9.2.001" expanded="true" height="103" name="Multiply" width="90" x="514" y="34"/>
      <operator activated="true" class="aggregate" compatibility="9.2.001" expanded="true" height="82" name="Aggregate" width="90" x="648" y="34">
        <parameter key="use_default_aggregation" value="false"/>
        <parameter key="attribute_filter_type" value="all"/>
        <parameter key="attribute" value=""/>
        <parameter key="attributes" value=""/>
        <parameter key="use_except_expression" value="false"/>
        <parameter key="value_type" value="attribute_value"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="time"/>
        <parameter key="block_type" value="attribute_block"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="value_matrix_row_start"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
        <parameter key="default_aggregation_function" value="average"/>
        <list key="aggregation_attributes">
          <parameter key="item" value="count"/>
        </list>
        <parameter key="group_by_attributes" value="quarter|region|item"/>
        <parameter key="count_all_combinations" value="false"/>
        <parameter key="only_distinct" value="false"/>
        <parameter key="ignore_missings" value="true"/>
      </operator>
      <operator activated="true" class="aggregate" compatibility="9.2.001" expanded="true" height="82" name="Aggregate (2)" width="90" x="648" y="187">
        <parameter key="use_default_aggregation" value="false"/>
        <parameter key="attribute_filter_type" value="all"/>
        <parameter key="attribute" value=""/>
        <parameter key="attributes" value=""/>
        <parameter key="use_except_expression" value="false"/>
        <parameter key="value_type" value="attribute_value"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="time"/>
        <parameter key="block_type" value="attribute_block"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="value_matrix_row_start"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
        <parameter key="default_aggregation_function" value="average"/>
        <list key="aggregation_attributes">
          <parameter key="item" value="count"/>
        </list>
        <parameter key="group_by_attributes" value="quarter|region"/>
        <parameter key="count_all_combinations" value="false"/>
        <parameter key="only_distinct" value="false"/>
        <parameter key="ignore_missings" value="true"/>
      </operator>
      <operator activated="true" class="rename" compatibility="9.2.001" expanded="true" height="82" name="Rename" width="90" x="782" y="187">
        <parameter key="old_name" value="count(item)"/>
        <parameter key="new_name" value="region_quarter_total"/>
        <list key="rename_additional_attributes"/>
      </operator>
      <operator activated="true" class="concurrency:join" compatibility="9.2.001" expanded="true" height="82" name="Join" width="90" x="916" y="34">
        <parameter key="remove_double_attributes" value="true"/>
        <parameter key="join_type" value="inner"/>
        <parameter key="use_id_attribute_as_key" value="false"/>
        <list key="key_attributes">
          <parameter key="region" value="region"/>
          <parameter key="quarter" value="quarter"/>
        </list>
        <parameter key="keep_both_join_attributes" value="false"/>
      </operator>
      <operator activated="true" class="generate_attributes" compatibility="9.2.001" expanded="true" height="82" name="Generate Attributes" width="90" x="1050" y="34">
        <list key="function_descriptions">
          <parameter key="proportion" value="[count(item)]/region_quarter_total"/>
        </list>
        <parameter key="keep_all" value="true"/>
      </operator>
      <operator activated="true" class="select_attributes" compatibility="9.2.001" expanded="true" height="82" name="Select Attributes" width="90" x="1184" y="34">
        <parameter key="attribute_filter_type" value="subset"/>
        <parameter key="attribute" value=""/>
        <parameter key="attributes" value="region|quarter|item|proportion"/>
        <parameter key="use_except_expression" value="false"/>
        <parameter key="value_type" value="attribute_value"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="time"/>
        <parameter key="block_type" value="attribute_block"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="value_matrix_row_start"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
      </operator>
      <connect from_op="Execute Python" from_port="output 1" to_op="Numerical to Polynominal" to_port="example set input"/>
      <connect from_op="Numerical to Polynominal" from_port="example set output" to_op="Reorder Attributes" to_port="example set input"/>
      <connect from_op="Reorder Attributes" from_port="example set output" to_op="Multiply" to_port="input"/>
      <connect from_op="Multiply" from_port="output 1" to_op="Aggregate" to_port="example set input"/>
      <connect from_op="Multiply" from_port="output 2" to_op="Aggregate (2)" to_port="example set input"/>
      <connect from_op="Aggregate" from_port="example set output" to_op="Join" to_port="left"/>
      <connect from_op="Aggregate (2)" from_port="example set output" to_op="Rename" to_port="example set input"/>
      <connect from_op="Rename" from_port="example set output" to_op="Join" to_port="right"/>
      <connect from_op="Join" from_port="join" to_op="Generate Attributes" to_port="example set input"/>
      <connect from_op="Generate Attributes" from_port="example set output" to_op="Select Attributes" to_port="example set input"/>
      <connect from_op="Select Attributes" from_port="example set output" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
</operator>
</process>

I generated some random data with Python.

Best regards,

Sebastian

SylvainM

New Altair Community Member

May 7, 2019

Thanks BalazsBarany and SGolbert for your help,

Your solution, Sebastian, is perfect! Thank you so much!