Lag series operator with lag -1

qwertz2

 

Dear all,

 

I would like to suggest a new feature to the "lag series" operator of the series extension. Currently this operator lags the selected attribute according to the specified parameter. However, the parameter has to be >= 1. So I was wondering why this is limited in that way. I would come handy if this operator could also lag negative values -> the other direction.

 

Best regards

Sachs

 

<?xml version="1.0" encoding="UTF-8"?><process version="7.5.001">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="7.5.001" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="generate_data" compatibility="7.5.001" expanded="true" height="68" name="Generate Data" width="90" x="45" y="34"/>
      <operator activated="true" class="series:lag_series" compatibility="7.4.000" expanded="true" height="82" name="Lag Series" width="90" x="179" y="34">
        <list key="attributes">
          <parameter key="att1" value="1"/>
        </list>
      </operator>
      <connect from_op="Generate Data" from_port="output" to_op="Lag Series" to_port="example set input"/>
      <connect from_op="Lag Series" 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>

Thomas_Ott

Hey, this is a great idea. Have you thought about adding it to our Idea forum? Our Developers scan that regularily for ideas instead of digging through there. 

suleymansahal

Hi,

Is there any development for this idea?

MartinLiebig

Hi @suleymansahal,

I see where you are comming from. A workaround would be to sort the data set the other way around, lag it, and sort it again.

 

Best,

Martin

suleymansahal

Hi Martin,

 

Thank you for the solution. I guess I just have to create new id attribute if the present one is not in correct order.