Generate Data y=f(x)

Jens_FleckensteJens_Fleckenste Member Posts: 7 Contributor I
edited November 2018 in Help

Hi All,


I'm a beginner and I just simply wants to gerenate a small table with two atrributes, x and y.

x = 1,2,3,4,5

y = x^2 = 1,2, 4,9,16,25


I tried to do that with the generate Data processors, but I couldn't manage it.


Can someone help me? Thank you in advance.





Best Answer


  • Options
    MartinLiebigMartinLiebig Administrator, Moderator, Employee, RapidMiner Certified Analyst, RapidMiner Certified Expert, University Professor Posts: 3,517 RM Data Scientist

    Hallo Jens,


    Just check the attached process. This is how i created a sqrt function for my latest gbt kb article.



    <?xml version="1.0" encoding="UTF-8"?><process version="7.4.000">
    <operator activated="true" class="process" compatibility="7.4.000" expanded="true" name="Process">
    <process expanded="true">
    <operator activated="true" breakpoints="after" class="subprocess" compatibility="7.4.000" expanded="true" height="82" name="Subprocess" width="90" x="45" y="34">
    <process expanded="true">
    <operator activated="true" class="generate_data" compatibility="7.4.000" expanded="true" height="68" name="Generate Data" width="90" x="45" y="34">
    <parameter key="number_examples" value="%{points}"/>
    <operator activated="true" class="generate_id" compatibility="7.4.000" expanded="true" height="82" name="Generate ID" width="90" x="179" y="34"/>
    <operator activated="true" class="generate_attributes" compatibility="7.4.000" expanded="true" height="82" name="Generate Attributes" width="90" x="313" y="34">
    <list key="function_descriptions">
    <parameter key="value" value="sqrt(id/eval(%{points}))"/>
    <parameter key="id" value="id/eval(%{points})"/>
    <operator activated="true" class="select_attributes" compatibility="7.4.000" expanded="true" height="82" name="Select Attributes" width="90" x="447" y="34">
    <parameter key="attribute_filter_type" value="subset"/>
    <parameter key="attributes" value="value|id"/>
    <parameter key="include_special_attributes" value="true"/>
    <operator activated="true" class="rename" compatibility="7.4.000" expanded="true" height="82" name="Rename" width="90" x="581" y="34">
    <parameter key="old_name" value="id"/>
    <parameter key="new_name" value="x"/>
    <list key="rename_additional_attributes"/>
    <operator activated="true" class="set_role" compatibility="7.4.000" expanded="true" height="82" name="Set Role" width="90" x="709" y="34">
    <parameter key="attribute_name" value="x"/>
    <list key="set_additional_roles">
    <parameter key="value" value="label"/>
    <connect from_op="Generate Data" from_port="output" to_op="Generate ID" to_port="example set input"/>
    <connect from_op="Generate ID" from_port="example set output" 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_op="Rename" to_port="example set input"/>
    <connect from_op="Rename" from_port="example set output" to_op="Set Role" to_port="example set input"/>
    <connect from_op="Set Role" from_port="example set output" to_port="out 1"/>
    <portSpacing port="source_in 1" spacing="0"/>
    <portSpacing port="sink_out 1" spacing="0"/>
    <portSpacing port="sink_out 2" spacing="0"/>
    <connect from_op="Subprocess" from_port="out 1" 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"/>
    - Sr. Director Data Solutions, Altair RapidMiner -
    Dortmund, Germany
  • Options
    Jens_FleckensteJens_Fleckenste Member Posts: 7 Contributor I

    Hi Martin,


    ok thank you, I understand.


    I just wonder, where you have defined the value 1000 behind the variable %{points}. (Generates 1000 Rows).

     Could you please explain that?






  • Options
    Jens_FleckensteJens_Fleckenste Member Posts: 7 Contributor I

    ah ok,

    I was expectinig a Set macro Process.


    I Didn't know the context panel.


    Thanks a lot


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