top TF-IDF keyword

ahootanha

Hello
I want to extract five words with the highest tf-idf in the output tf-idf matrix.
How should i do ???
Thanks

 

and how remove '@' , '#' charachters and url from sentence in rapidminer???

lionelderkrikor

Hi @ahootanha,

 

To answer to your first question, you can find here a process which perform what you want to do : 

<?xml version="1.0" encoding="UTF-8"?><process version="8.1.000">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="8.1.000" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="social_media:search_twitter" compatibility="8.1.000" expanded="true" height="68" name="Search Twitter" width="90" x="112" y="34">
        <parameter key="connection" value="dkk"/>
        <parameter key="query" value="tesla"/>
      </operator>
      <operator activated="true" class="nominal_to_text" compatibility="8.1.000" expanded="true" height="82" name="Nominal to Text" width="90" x="246" y="34">
        <parameter key="attribute_filter_type" value="single"/>
        <parameter key="attribute" value="Text"/>
      </operator>
      <operator activated="true" class="select_attributes" compatibility="8.1.000" expanded="true" height="82" name="Select Attributes" width="90" x="380" y="34">
        <parameter key="attribute_filter_type" value="single"/>
        <parameter key="attribute" value="Text"/>
      </operator>
      <operator activated="true" class="text:process_document_from_data" compatibility="8.1.000" expanded="true" height="82" name="Process Documents from Data" width="90" x="514" y="34">
        <list key="specify_weights"/>
        <process expanded="true">
          <operator activated="true" class="text:tokenize" compatibility="8.1.000" expanded="true" height="68" name="Tokenize" width="90" x="380" y="34"/>
          <connect from_port="document" to_op="Tokenize" to_port="document"/>
          <connect from_op="Tokenize" from_port="document" to_port="document 1"/>
          <portSpacing port="source_document" spacing="0"/>
          <portSpacing port="sink_document 1" spacing="0"/>
          <portSpacing port="sink_document 2" spacing="0"/>
        </process>
      </operator>
      <operator activated="true" class="text:wordlist_to_data" compatibility="8.1.000" expanded="true" height="82" name="WordList to Data" width="90" x="648" y="85"/>
      <operator activated="true" class="sort" compatibility="8.1.000" expanded="true" height="82" name="Sort" width="90" x="782" y="85">
        <parameter key="attribute_name" value="total"/>
        <parameter key="sorting_direction" value="decreasing"/>
      </operator>
      <operator activated="true" class="filter_example_range" compatibility="8.1.000" expanded="true" height="82" name="Filter Example Range" width="90" x="916" y="85">
        <parameter key="first_example" value="1"/>
        <parameter key="last_example" value="5"/>
      </operator>
      <connect from_op="Search Twitter" from_port="output" to_op="Nominal to Text" to_port="example set input"/>
      <connect from_op="Nominal to Text" 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="Process Documents from Data" to_port="example set"/>
      <connect from_op="Process Documents from Data" from_port="example set" to_port="result 1"/>
      <connect from_op="Process Documents from Data" from_port="word list" to_op="WordList to Data" to_port="word list"/>
      <connect from_op="WordList to Data" from_port="example set" to_op="Sort" to_port="example set input"/>
      <connect from_op="Sort" from_port="example set output" to_op="Filter Example Range" to_port="example set input"/>
      <connect from_op="Sort" from_port="original" to_port="result 3"/>
      <connect from_op="Filter Example Range" from_port="example set output" to_port="result 2"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
      <portSpacing port="sink_result 3" spacing="0"/>
      <portSpacing port="sink_result 4" spacing="0"/>
    </process>
  </operator>
</process>

I hope it helps,

 

Regards,

 

Lionel