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Hi, I have a signal that grows and then decreases over a condition. I would like to calculate only the average rate of growth, that is from the start value to the maximum. The signal does not grow monotically, which means that the rate locally decreases before the maximum is attained. I tried to calculate the rate with this formula, but Seeq would not accept it: $signal_start = $signal.aggregate(startValue(), $condition, middleKey(), 0s) $signal_max = $signal.aggregate(maxValue(), $condition, middleKey(), 0s) $rate = ($signal_max - $signal_start)/($signal.maxKey($condition) - $signal.startKey($condition)) Would you have any suggestion how one could do this without using the derivative() function? Thank you very much in advance for your answer.

Starting with Seeq R.21.0.44.0 release, user can specify maxValue() and maxKey() on a signal during a capsule to return the scalar values of maximum value and associated time stamp respectively. The example below shows that on Temperature signal, during 16th October (capsule), maxValue() function results in 106.07 ºF and maxKey() function results in associated timestamp 2019-10-16 02:18 am i.e. when maximum temperature occurred. See the 1st image for this example in Seeq: Feel free to try out these formulas on your own: $temperature.maxKey(capsule('2019-10-16T00:00Z','2019-10-17T00:00Z')) $temperature.maxValue(capsule('2019-10-16T00:00Z','2019-10-17T00:00Z')) Oh one more thing, you can also create signals that return one value from each capsule within a condition. Where value can be maxValue(), minValue(), maxKey(), minKey(). Below is one such example and an image showing that you can create signal that represents minimum values at minimum key (time) on daily basis: $signal.aggregate(minValue(), $condition, minKey()) As always detailed information can be found in formula tool panel documentation search box in Seeq application. Still want more Seeq info? Check out what else is new in R21.0.44.00: https://seeq12.atlassian.net/wiki/spaces/KB/pages/571375775/What+s+New+in+R21.0.44