Read .Net system.datetime

onep

Hello.

Is there any way that I can read a 18-digit .Net system.datetime in Rapidminer? I like to convert it to something readable for a human.

 

Here is an examble of a number; 634019213109374850

Which should be converted to 2010-02-16​T12:48:30.937Z

IngoRM

Hi,

 

That is actually pretty tough.  Originally I thought, that you can just convert the ticks into milliseconds and convert this into a date object (see process below).  But the problem is that this does not account for DST, leap seconds etc. which means that in aggregate you are roughly 4 weeks off :smileysad:

 

I posted the process for educational reasons but this might not something you can easily solve without calling an external .Net routine (which is possible, e.g. with a command line call done by the operator "Execute Program").

 

Cheers,

Ingo

 

<?xml version="1.0" encoding="UTF-8"?><process version="7.3.000">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="7.3.000" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="generate_data_user_specification" compatibility="7.3.000" expanded="true" height="68" name="Generate Data by User Specification" width="90" x="112" y="34">
        <list key="attribute_values">
          <parameter key="dot_net_date" value="634019213109374850"/>
        </list>
        <list key="set_additional_roles"/>
      </operator>
      <operator activated="true" class="generate_attributes" compatibility="7.3.000" expanded="true" height="82" name="Generate Attributes" width="90" x="246" y="34">
        <list key="function_descriptions">
          <parameter key="dot_net_date" value="(dot_net_date/10000)-(1970*365*24*60*60*1000)"/>
        </list>
      </operator>
      <operator activated="true" class="numerical_to_date" compatibility="7.3.000" expanded="true" height="82" name="Numerical to Date" width="90" x="380" y="34">
        <parameter key="attribute_name" value="dot_net_date"/>
      </operator>
      <connect from_op="Generate Data by User Specification" from_port="output" to_op="Generate Attributes" to_port="example set input"/>
      <connect from_op="Generate Attributes" from_port="example set output" to_op="Numerical to Date" to_port="example set input"/>
      <connect from_op="Numerical to Date" 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>