Frederic Branczyk dbf83666bb add idelta function
similar to the irate function the idelta function calculates the delta
function with the last two values
2016-08-08 10:40:50 +02:00
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2016-07-21 00:09:19 +01:00
2016-08-08 10:40:50 +02:00
2016-03-02 23:00:23 +01:00