Generate a Function & apply it to all/some attributes automatically

1705410G · January 2019

I've created a new attribute using the Generate Attribute operator.
Attribute name N_speed, with 'N' representing the location.
E.g. 2_speed represents speed at location 2.

(New) Attribute Name: 2speed
Function Expressions: if([2_speed]>=70,"DANGER","SAFE").

However, I have nearly 300 attributes. I've tried adding new entries and replacing each with the name of the next attribute, but its just too much work.

Hence, Is there any way to apply the same function to all attributes automatically?

if([2_speed]>=70,"DANGER","SAFE")
if([3_speed]>=70,"DANGER","SAFE")
if([4_speed]>=70,"DANGER","SAFE")
if([5_speed]>=70,"DANGER","SAFE")
if([6_speed]>=70,"DANGER","SAFE")
if([7_speed]>=70,"DANGER","SAFE") and so on...

Thanks.

Regards,
AY

MartinLiebig · January 2019

Hi,
Loop attributes is your friend

.

BR,
Martin

lionelderkrikor · January 2019

Hi @1705410G,

You have to put the Generate Attributes operator inside the Loop Attributes operator :
Here a process to show you how to proceed :

<?xml version="1.0" encoding="UTF-8"?><process version="9.2.000-SNAPSHOT">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="9.2.000-SNAPSHOT" 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="operator_toolbox:create_exampleset" compatibility="1.7.000" expanded="true" height="68" name="Create ExampleSet" width="90" x="112" y="136">
        <parameter key="generator_type" value="numeric_series"/>
        <parameter key="number_of_examples" value="10"/>
        <parameter key="use_stepsize" value="false"/>
        <list key="function_descriptions"/>
        <parameter key="add_id_attribute" value="false"/>
        <list key="numeric_series_configuration">
          <parameter key="att_1" value="linear.0\.0.10\.0"/>
          <parameter key="att_2" value="linear.10\.0.20\.0"/>
        </list>
        <list key="date_series_configuration"/>
        <list key="date_series_configuration (interval)"/>
        <parameter key="date_format" value="yyyy-MM-dd HH:mm:ss"/>
        <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="concurrency:loop_attributes" compatibility="9.2.000-SNAPSHOT" expanded="true" height="82" name="Loop Attributes" width="90" x="380" y="136">
        <parameter key="attribute_filter_type" value="all"/>
        <parameter key="attribute" value=""/>
        <parameter key="attributes" value=""/>
        <parameter key="use_except_expression" value="false"/>
        <parameter key="value_type" value="attribute_value"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="time"/>
        <parameter key="block_type" value="attribute_block"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="value_matrix_row_start"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
        <parameter key="attribute_name_macro" value="loop_attribute"/>
        <parameter key="reuse_results" value="true"/>
        <parameter key="enable_parallel_execution" value="true"/>
        <process expanded="true">
          <operator activated="true" class="generate_attributes" compatibility="9.2.000-SNAPSHOT" expanded="true" height="82" name="Generate Attributes" width="90" x="313" y="85">
            <list key="function_descriptions">
              <parameter key="%{loop_attribute}_bis" value="if(eval(%{loop_attribute})&gt;5,&quot;true&quot;,&quot;false&quot;)"/>
            </list>
            <parameter key="keep_all" value="true"/>
          </operator>
          <connect from_port="input 1" to_op="Generate Attributes" to_port="example set input"/>
          <connect from_op="Generate Attributes" from_port="example set output" to_port="output 1"/>
          <portSpacing port="source_input 1" spacing="0"/>
          <portSpacing port="source_input 2" spacing="0"/>
          <portSpacing port="sink_output 1" spacing="0"/>
          <portSpacing port="sink_output 2" spacing="0"/>
        </process>
      </operator>
      <connect from_op="Create ExampleSet" from_port="output" to_op="Loop Attributes" to_port="input 1"/>
      <connect from_op="Loop Attributes" from_port="output 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"/>
    </process>
  </operator>
</process>

Hope it helps,

Regards,

Lionel

Telcontar120 · January 2019

if you are using Loop Attributes, you should be referring to the attribute being handled via the associated macro, and this should clear up the problem that you were having with the EVAL function error. That macro is bound to the operator so you don't have to enable anything to get it (but you do need to fill in the name you want to use in the parameters).

Telcontar120 · January 2019

This is really hard to troubleshoot without data, but you could try the #{loop_attribute} macro syntax instead of eval(%{loop_attribute}) and see if that solves your problem.

1705410G · January 2019

@ mschmitz

Hi! I tried using it earlier on, but failed.
Hence, What are the Parameters of Loop Attributes I should make changes to?
How can I insert the function expression?

Regards,
AY

1705410G · January 2019

Hi lionelderkrikor ,

Do I have to change the attribute name and function to my own attribute name or should I leave it to what you've provided me?

As I kept getting this error inside the Generate Attribute operator.
Expression Evaluation Error: The function 'eval' failed to parse the subexpression '2_speed'. Cause: token recognition error at '_'

And how do I make an exception for my date_time? So that it wouldn't be involved in any looping?

P.S. I've also changed my function to if(([2_speed]<=35),"LOW",if(([2_speed]<=53),"MODERATE",if(([2_speed]<=70),"HIGH","VERY HIGH"))) instead. How should I insert it?

Regards,
AY

1705410G · January 2019

Hi lionelderkrikor ,

Also, after pasting it in the process, I do not have the loop_attribute macro (inside Generate Attribute) as compared to pasting it into a brand new process. Does it matter?

Regards,
AY

1705410G · January 2019

Hi Telcontar120

Sorry, I don't get what you mean. I followed the steps shown in the video below but the error stills occur.

Expression Evaluation Error: The function 'eval' failed to parse the subexpression '2_speed'. Cause: token recognition error at '_' .

Does it mean that I have to remove the underscore used in all my attributes' name?

Video Reference: https://academy.rapidminer.com/learn/video/loop-attributes

Regards,
AY

SGolbert · January 2019

Hi @1705410G ,

at this point providing a sample dataset and process would help a lot.

Regards,

Sebastian

1705410G · January 2019

SGolbert,

Sorry, but I won't be able to share any dataset and process as it is school related.

However, what I has is 2 Loop Attributes Operator, each containing a Generate Attribute Operator.

Attribute Name(Inside Generate Attribute) for both Loop Attributes Operator: %{loop_attribute}

Function for 1st Loop Attributes Operator: if((eval(%{loop_attribute})<=35),"LOW",if((eval(%{loop_attribute})<=53),"MODERATE",if((eval(%{loop_attribute})<=70),"HIGH","VERY HIGH")))

Function for 1st Loop Attributes Operator: if((eval(%{loop_attribute})<=35),"LOW",if((eval(%{loop_attribute})<=53),"MODERATE",if((eval(%{loop_attribute})<=70),"HIGH","VERY HIGH")))

Image: https://us.v-cdn.net/6030995/uploads/editor/uz/2x43s2zjhudb.png

This are the errors I've been receiving (Shown in below).
But I've selected subset in attribute filter type. Iterations should not have been 0.

Image: https://us.v-cdn.net/6030995/uploads/editor/ph/kalkc671qrjh.png

I am very confused. Once I solved the first error, second error pops up. Solved it, first error back again and vice versa. I've changed my naming countless times, with underscore to no underscore, numbers (10) to spelling (ten).

I have no idea what went wrong.

Hope this can help you better analyse!

Regards,
AY

1705410G · January 2019

1705410G · January 2019

@ mschmitz

Hi! I tried using it earlier on, but failed.
Hence, What are the Parameters of Loop Attributes I should make changes to?

Regards,
AY

1705410G · January 2019

Hi lionelderkrikor ,

Do I have to change the attribute name and function inside the Generate Attribute operator to my own attribute name or should I leave it to what you've provided me?

As I kept getting this error inside the Generate Attribute operator.
Expression Evaluation Error: The function 'eval' failed to parse the subexpression '2_speed'. Cause: token recognition error at '_'

Regards,
AY

1705410G · January 2019

Hi lionelderkrikor ,

Just to add on, how do I copy your codes into my process without removing my other existing operators? As I can only paste into a new process.

Regards,
AY

1705410G · January 2019

SGolbert,

Sorry, but I won't be able to share any dataset and process as it is school related.

However, what I has is 2 Loop Attributes Operator, each containing a Generate Attribute Operator.

Attribute Name(Inside Generate Attribute) for both Loop Attributes Operator: %{loop_attribute}

Function for 1st Loop Attributes Operator: if((eval(%{loop_attribute})<=35),"LOW",if((eval(%{loop_attribute})<=53),"MODERATE",if((eval(%{loop_attribute})<=70),"HIGH","VERY HIGH")))

Function for 1st Loop Attributes Operator: if((eval(%{loop_attribute})<=35),"LOW",if((eval(%{loop_attribute})<=53),"MODERATE",if((eval(%{loop_attribute})<=70),"HIGH","VERY HIGH")))

This are the errors I've been receiving (Shown in below).
But I've selected subset in attribute filter type. Iterations should not have been 0.

Image: https://us.v-cdn.net/6030995/uploads/editor/qq/sixrsldyqo6u.png

I am very confused. Once I solved the first error, second error pops up. Solved it, first error back again and vice versa. I've changed my naming countless times, with underscore to no underscore, numbers (10) to spelling (ten).

I have no idea what went wrong.

Regards,
AY

1705410G · January 2019

@ mschmitz

Hi! I tried using it earlier on, but failed.
Hence, What are the Parameters of Loop Attributes I should make changes to?

Regards,
AY

1705410G · January 2019

Hi lionelderkrikor ,

Do I have to change the attribute name and function inside the Generate Attribute operator to my own attribute name or should I leave it to what you've provided me?

As I kept getting this error inside the Generate Attribute operator.
Expression Evaluation Error: The function 'eval' failed to parse the subexpression '2_speed'. Cause: token recognition error at '_'

Regards,
AY

1705410G · January 2019

Hi lionelderkrikor ,

Just to add on, how do I copy your codes into my process without removing my other existing operators? As I can only paste into a new process.

Regards,
AY

1705410G · January 2019

Howdy, Stranger!

Quick Links

Categories

Altair RapidMiner Community

GET HELP. LEARN BEST PRACTICES. NETWORK WITH YOUR PEERS.

Generate a Function & apply it to all/some attributes automatically

Best Answers

Answers