RemoveAboveValue


Description	Removes data samples from each input time-series that are larger than a specified threshold value.
Input	Time Series: Multiple (Single or multiple time-series)
Parameters	Threshold \|  Mandatory, numeric
Output	Transformed Time Series: Multiple
Available in	Alerts, Composites, Dashboards

The RemoveBelowValue function is useful when the underlying data is known to contain data spikes which are irrelevant or invalid, and should be removed.

Usage Example

An Ad-tech company monitors the cost of several advertising campaigns. Occasionally, a bug is introduced in the data collection process, which results in a huge outlier:

This spike, however, does not reflect a valid value, and should be removed. By applying the RemoveAboveValue function (specifying a threshold of 1000) the spike can be removed from the time series, and the normal pattern is clearly evident:

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The RemoveBelowValue function can be used when the invalid samples are not spikes, but drops.