---
title: average_y() | average_x() | Tiger Data Docs
description: Calculate the average from a two-dimensional statistical aggregate for the dimension specified
---

Since [1.3.0](https://github.com/timescale/timescaledb-toolkit/releases/tag/1.3.0)

Calculate the average from a two-dimensional aggregate for the given dimension. For example, `average_y()` calculates the average for all the values of the `y` variable, independent of the values of the `x` variable.

## Samples

Calculate the average of the integers from 0 to 100:

```
SELECT average_x(stats_agg(y, x))
  FROM generate_series(1, 5) y,
       generate_series(0, 100) x;
```

```
average
-----------
50
```

## Arguments

The syntax is:

```
average_y(
  summary StatsSummary2D
) RETURNS DOUBLE PRECISION
```

```
average_x(
  summary StatsSummary2D
) RETURNS DOUBLE PRECISION
```

| Name    | Type           | Default | Required | Description                                              |
| ------- | -------------- | ------- | -------- | -------------------------------------------------------- |
| summary | StatsSummary2D | -       | ✔        | The statistical aggregate produced by a `stats_agg` call |

## Returns

| Column     | Type       | Description      |
| ---------- | ---------- | ---------------- |
| average\_y | average\_x | DOUBLE PRECISION |