timedMovingAverage() function
The timedMovingAverage() function calculates the mean of values in a defined time
range at a specified frequency.
Function type: Transformation
timedMovingAverage(
every: 1d,
period: 5d,
column: "_value"
)
Parameters
every
The frequency of time windows.
Data type: Duration
period
The length of each averaged time window. A negative duration indicates start and stop boundaries are reversed.
Data type: Duration
column
The column used to compute the moving average.
Defaults to "_value".
Data type: String
Examples
Calculate a five year moving average every year
from(bucket: "example-bucket"):
|> range(start: -7y)
|> filter(fn: (r) =>
r._measurement == "financial" and
r._field == "closing_price"
)
|> timedMovingAverage(every: 1y, period: 5y)
Calculate a seven day moving average every day
from(bucket: "example-bucket"):
|> range(start: -50d)
|> filter(fn: (r) =>
r._measurement == "financial" and
r._field == "closing_price"
)
|> timedMovingAverage(every: 1d, period: 7d)
Function definition
timedMovingAverage = (every, period, column="_value", tables=<-) =>
tables
|> window(every: every, period: period)
|> mean(column:column)
|> duplicate(column: "_stop", as: "_time")
|> window(every: inf)
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