[Solved]Regular Expression in FIlter Example

aryan_hosseinzaaryan_hosseinza Member Posts: 74 Contributor II
edited November 2018 in Help
Hi every,

I have a dataset with an attribute with values d_[number], i_[number] , p_[number],

I'd like to know how  I can use regular expression in filtering examples, and how I can parse numbers out of values of an attribute,

So I will be able to filter those examples which start with d_ and parse the number in this value,

I'd be happy if you could help me,

Thanks ,


  • MariusHelfMariusHelf RapidMiner Certified Expert, Member Posts: 1,869 Unicorn
    Hi Arian,

    here you go! The first two operators are just to prepare the data.

    Best, Marius
    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <process version="5.3.000">
      <operator activated="true" class="process" compatibility="5.3.000" expanded="true" name="Process">
        <process expanded="true" height="116" width="681">
          <operator activated="true" class="generate_nominal_data" compatibility="5.3.000" expanded="true" height="60" name="Generate Nominal Data" width="90" x="45" y="30"/>
          <operator activated="true" breakpoints="after" class="replace" compatibility="5.3.000" expanded="true" height="76" name="Replace (2)" width="90" x="179" y="30">
            <parameter key="replace_what" value="value(\d+)"/>
            <parameter key="replace_by" value="p_$1"/>
          <operator activated="true" class="filter_examples" compatibility="5.3.000" expanded="true" height="76" name="Filter Examples" width="90" x="313" y="30">
            <parameter key="condition_class" value="attribute_value_filter"/>
            <parameter key="parameter_string" value="att1=.*_\d"/>
          <operator activated="true" class="replace" compatibility="5.3.000" expanded="true" height="76" name="Replace" width="90" x="447" y="30">
            <parameter key="replace_what" value="p_(\d+)"/>
            <parameter key="replace_by" value="$1"/>
          <operator activated="true" class="parse_numbers" compatibility="5.3.000" expanded="true" height="76" name="Parse Numbers" width="90" x="581" y="30"/>
          <connect from_op="Generate Nominal Data" from_port="output" to_op="Replace (2)" to_port="example set input"/>
          <connect from_op="Replace (2)" from_port="example set output" to_op="Filter Examples" to_port="example set input"/>
          <connect from_op="Filter Examples" from_port="example set output" to_op="Replace" to_port="example set input"/>
          <connect from_op="Replace" from_port="example set output" to_op="Parse Numbers" to_port="example set input"/>
          <connect from_op="Parse Numbers" 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"/>
  • aryan_hosseinzaaryan_hosseinza Member Posts: 74 Contributor II
    Thanks buddy,

    It's solved
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