added movingAverage and mode functions, resolves #298

content/v2.0/reference/flux/functions/built-in/transformations/aggregates/mode.md

@@ -0,0 +1,43 @@
+---
+title: mode() function
+description: >
+  The `mode()` function computes the mode or value that occurs most often among
+  records in the input table.
+menu:
+  v2_0_ref:
+    name: mode
+    parent: built-in-aggregates
+weight: 501
+---
+
+The `mode()` function computes the mode or value that occurs most often among
+records in the input table.
+
+_**Function type:** Aggregate_  
+
+## Parameters
+
+### column
+The column to use to compute the mode.
+Defaults to `"_value"`.
+
+_**Data type:** String_
+
+## Examples
+
+###### Mode as an aggregate
+```js
+from(bucket: "example-bucket")
+  |> filter(fn: (r) =>
+    r._measurement == "errors" and
+    r._field == "count_per_minute"
+  )
+  |> range(start:-12h)
+  |> window(every:10m)
+  |> mode()
+```
+
+<hr style="margin-top:4rem"/>
+
+##### Related InfluxQL functions and statements:
+[MODE()](https://docs.influxdata.com/influxdb/latest/query_language/functions/#mode)  

content/v2.0/reference/flux/functions/built-in/transformations/aggregates/movingaverage.md

@@ -0,0 +1,85 @@
+---
+title: movingAverage() function
+description: >
+  The `movingAverage()` function calculates the mean of values in a defined time
+  range at a specified frequency.
+menu:
+  v2_0_ref:
+    name: movingAverage
+    parent: built-in-aggregates
+weight: 501
+---
+
+The `movingAverage()` function calculates the mean of values in a defined time
+range at a specified frequency.
+
+_**Function type:** Aggregate_  
+
+```js
+movingAverage(
+  every: 1d,
+  period: 5d,
+  column="_value",
+  timeSrc="_stop",
+  timeDst="_time",
+)
+```
+
+## 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_
+
+### timeSrc
+The column used as the source for the aggregated time.
+Defaults to `"_stop"`.
+
+_**Data type:** String_
+
+### timeDst
+The column in which to store the aggregated time.
+Defaults to `"_time"`.
+
+_**Data type:** String_
+
+## Examples
+
+###### Calculate a five year moving average every year
+```js
+from(bucket: "example-bucket"):
+  |> range(start: -7y)
+  |> filter(fn: (r) =>
+    r._measurement == "financial" and
+    r._field == "closing_price"
+  )
+  |> movingAverage(every: 1y, period: 5y)
+```
+
+## Function definition
+```js
+movingAverage = (every, period, column="_value", timeSrc="_stop",timeDst="_time", tables=<-) =>
+  tables
+    |> window(every: every, period: period)
+    |> mean()
+    |> duplicate(column: "_stop", as: "_time")
+    |> window(every: inf)
+```
+
+<hr style="margin-top:4rem"/>
+
+##### Related InfluxQL functions and statements:
+[MOVING_AVERAGE()](https://docs.influxdata.com/influxdb/latest/query_language/functions/#moving-average)