How to insert text in multiple attributes (in the beginning)?

ebayundso

Hi all,

i try to add text to all my values in one attrtibute, for example my values of attributes are:

 

Up

Polo

Beetle

Tiguan
Touran

Caddy
Golf

Passat

 

an they should add "VW" in the beginning:

 

VW Up

VW Polo

VW Beetle

VW Tiguan
VW Touran

VW Caddy
VW Golf

VW Passat

 

Do you have a solution for my problem?

Thomas_Ott

I would use the Replace operator for that. You'd have to do a RegEx to select the word and then append it with VW.

 

of the top of my head something like this (.*) to select it and replace it with VW $1

lionelderkrikor

Hi @ebayundso,

 

I don't know if it is the optimal solution, but it works : 

<?xml version="1.0" encoding="UTF-8"?><process version="8.1.003">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="8.1.003" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="read_excel" compatibility="8.1.003" expanded="true" height="68" name="Read Excel" width="90" x="179" y="34">
        <parameter key="excel_file" value="C:\Users\Lionel\Documents\Formations_DataScience\Rapidminer\Tests_Rapidminer\Replace_Values\Replace_values.xlsx"/>
        <parameter key="imported_cell_range" value="A1:A9"/>
        <parameter key="first_row_as_names" value="false"/>
        <list key="annotations">
          <parameter key="0" value="Name"/>
        </list>
        <list key="data_set_meta_data_information">
          <parameter key="0" value="Att1.true.polynominal.attribute"/>
        </list>
      </operator>
      <operator activated="true" class="replace" compatibility="8.1.003" expanded="true" height="82" name="Replace" width="90" x="313" y="34">
        <parameter key="attribute_filter_type" value="single"/>
        <parameter key="attribute" value="Att1"/>
        <parameter key="replace_what" value="(?&lt;![^ ])(?=[^ ])(?!VW )"/>
        <parameter key="replace_by" value="\VW "/>
      </operator>
      <connect from_op="Read Excel" from_port="output" to_op="Replace" to_port="example set input"/>
      <connect from_op="Replace" 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>

Regards,

 

Lionel

ebayundso

Thomas_Ott: this adds a "VW" in the beginning but also in the end...

Telcontar120

Using "Generate Attributes" you can also create another attribute with the value VW (or other car manufacturers as needed) and then create a third attribute which concatenates the manufacturer and the model.

 

Edin_Klapic

Hi @ebayundso,

 

In the Parameter replace what the RegEx characters ^ and $ have an additional meaning.

If you use ^ as first character it means "Beginning". $ means "End"

The RegEx would then be:

Replace: ^(.*)$

by: VW $1

 

Happy Mining,

Edin