Time: mixed unit (hours & minutes)

Pulpito

hi

I am cleaning a dataset before training it.

I have a time attribute which contains data with mixed units in nominal type: e.g. 2 hours, 45 minutes, 1.5 hours.

How can I standardize the unit preferably in numerical form? (e.g. 1.5 hours into simply 90; and 45 minutes into just 45).

Thanks

jwpfau

Hi,

not beautiful, but something like this would work:

<?xml version="1.0" encoding="UTF-8"?><process version="9.9.002">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="9.9.002" 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="utility:create_exampleset" compatibility="9.9.002" expanded="true" height="68" name="Create ExampleSet" width="90" x="45" y="34">
        <parameter key="generator_type" value="comma separated text"/>
        <parameter key="number_of_examples" value="100"/>
        <parameter key="use_stepsize" value="false"/>
        <list key="function_descriptions"/>
        <parameter key="add_id_attribute" value="false"/>
        <list key="numeric_series_configuration"/>
        <list key="date_series_configuration"/>
        <list key="date_series_configuration (interval)"/>
        <parameter key="date_format" value="yyyy-MM-dd HH:mm:ss"/>
        <parameter key="time_zone" value="SYSTEM"/>
        <parameter key="input_csv_text" value="duration&#10;2 hours, 45 minutes&#10;3 hours&#10;3 minutes&#10;1 hour&#10;1 minute&#10;1 hour, 1 minute&#10;0 hours, 5 minutes"/>
        <parameter key="column_separator" value=";"/>
        <parameter key="parse_all_as_nominal" value="false"/>
        <parameter key="decimal_point_character" value="."/>
        <parameter key="trim_attribute_names" value="true"/>
      </operator>
      <operator activated="true" class="generate_attributes" compatibility="9.9.002" expanded="true" height="82" name="Generate Attributes" width="90" x="179" y="34">
        <list key="function_descriptions">
          <parameter key="minutes" value="eval(replaceAll(replaceAll(replaceAll(replaceAll(duration, &quot;,&quot;, &quot;+&quot;), &quot;hour[s]?&quot;, &quot;*60&quot;), &quot;minute[s]?&quot;, &quot;&quot;), &quot; &quot;, &quot;&quot;), REAL)"/>
        </list>
        <parameter key="keep_all" value="true"/>
      </operator>
      <connect from_op="Create ExampleSet" from_port="output" to_op="Generate Attributes" to_port="example set input"/>
      <connect from_op="Generate 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>

Greetings,
Jonas

Pulpito

Thanks Jonas,

I am impressed with your technical knowledge.

But, I am a beginner and probably would need a simple solution.

At this stage of my experience, I still cannot associate any coding with RapidMiner.

Maybe, I should clean the file outside of RapidMiner.

Thanks a lot for your detailed solution.

Best