timedMovingAverage() function

timedMovingAverage() returns the mean of values in a defined time range at a specified frequency.

For each row in a table, timedMovingAverage() returns the average of the current value and all row values in the previous period (duration). It returns moving averages at a frequency defined by the every parameter.

Aggregate by calendar months and years

every and period parameters support all valid duration units, including calendar months (1mo) and years (1y).

Aggregate by week

When aggregating by week (1w), weeks are determined using the Unix epoch (1970-01-01T00:00:00Z UTC). The Unix epoch was on a Thursday, so all calculated weeks begin on Thursday.

Function type signature

(<-tables: stream[A], every: duration, period: duration, ?column: string) => stream[B] where A: Record, B: Record

{{% caption %}} For more information, see Function type signatures. {{% /caption %}}

Parameters

every

({{< req >}}) Frequency of time window.

period

({{< req >}}) Length of each averaged time window.

A negative duration indicates start and stop boundaries are reversed.

column

Column to operate on. Default is _value.

tables

Input data. Default is piped-forward data (<-).

Examples

Calculate a five year moving average every year

data
    |> timedMovingAverage(every: 1y, period: 5y)

{{< expand-wrapper >}} {{% expand "View example input and output" %}}

Input data

Output data

{{% /expand %}} {{< /expand-wrapper >}}