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Data Summary question

Hi guys,

 

Attached is an example of a data set I'm working with. Its 1 weeks worth of data from 2 sensors. I'm trying to write a JSL script to take this data and by sensor average the first 24 hours of data, the last 6 hours of data, and substract the two, finally summarising the difference in a summary table, by sensor. Does anyone have any ideas?

Re: Data Summary question

Very neat!

Re: Data Summary question

try this

Names Default To Here( 1 );
dt = Current Data Table();

dt << New Column( "Group",
 Character,
 formula(
  If(
   :Timestamp < Col Minimum( :Timestamp, :Sensor Number ) + 24 * 60 * 60, "First",
   :Timestamp > Col Maximum( :Timestamp, :Sensor Number ) - 6 * 60 * 60, "Last"
  )
 )
);

dtsumm = dt << Summary(
 Group( :Sensor Number ),
 Mean( :DataValue ),
 Subgroup( :Group ),
 Freq( "None" ),
 Weight( "None" ),
 statistics column name format( "column" ),
 Link to original data table( 0 )
);

dtsumm << New Column( "Delta", formula( :name( "DataValue, First" ) - :name( "DataValue, Last" ) ) );