rolling-max

Input Stack: n: Int TimeSeriesExpr

⇨

Output Stack: TimeSeriesExpr

Maximum value within a specified window. This operation can be used in alerting expressions to find a lower bound for noisy data based on recent samples. For example:

name,sps,:eq,:sum,
:dup,
5,:rolling-max

Missing values, NaN, will be ignored when computing the min. If all values within the window are NaN, then NaN will be emitted. For example:

Input	3,:rolling-max
0	0
1	1
-1	1
NaN	1
0	0
1	1
1	1
1	1
1	1
0	1

The window size, n, is the number of datapoints to consider including the current value. Note that it is based on datapoints not a specific amount of time. As a result the number of occurrences will be reduced when transitioning to a larger time frame that causes consolidation.

Since: 1.6

Before	After
:random, 0.4,:gt	:random, 0.4,:gt, 5,:rolling-max