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<?xml version="1.0" encoding="UTF-8" standalone="no"?><process version="5.1.001"> <context> <input/> <output/> <macros/> </context> <operator activated="true" class="process" compatibility="5.1.001" expanded="true" name="Process"> <process expanded="true" height="341" width="815"> <operator activated="true" class="generate_data" compatibility="5.1.001" expanded="true" height="60" name="Generate Data" width="90" x="45" y="75"> <parameter key="number_examples" value="10"/> </operator> <operator activated="true" class="select_attributes" compatibility="5.1.001" expanded="true" height="76" name="Select Attributes" width="90" x="179" y="75"> <parameter key="invert_selection" value="true"/> <parameter key="include_special_attributes" value="true"/> </operator> <operator activated="true" class="generate_attributes" compatibility="5.1.001" expanded="true" height="76" name="Generate Attributes" width="90" x="313" y="75"> <list key="function_descriptions"> <parameter key="Now" value="date_now()"/> </list> </operator> <operator activated="true" class="delay" compatibility="5.1.001" expanded="true" height="76" name="Delay" width="90" x="447" y="75"> <parameter key="delay" value="fixed"/> <parameter key="delay_amount" value="1234"/> </operator> <operator activated="true" class="generate_attributes" compatibility="5.1.001" expanded="true" height="76" name="Generate Attributes (2)" width="90" x="581" y="75"> <list key="function_descriptions"> <parameter key="NowPlus" value="date_now()"/> <parameter key="diff" value="date_diff(Now,NowPlus)"/> </list> </operator> <connect from_op="Generate Data" from_port="output" to_op="Select Attributes" to_port="example set input"/> <connect from_op="Select Attributes" from_port="example set output" to_op="Generate Attributes" to_port="example set input"/> <connect from_op="Generate Attributes" from_port="example set output" to_op="Delay" to_port="through 1"/> <connect from_op="Delay" from_port="through 1" to_op="Generate Attributes (2)" to_port="example set input"/> <connect from_op="Generate Attributes (2)" 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>
Answers
You should read the help section for "Date to Numerical" and "Generate Attribute" operators, and the resources listed under "help".
A little experiment reveals that the difference between 2 dates is in milliseconds. See the example below.
regards,
Andrew
Thanks both of you for pointing me in the right direction