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elasticsearch/docs/reference/query-languages/esql/_snippets/functions/atan2.md
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---------

Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com>
Co-authored-by: Liam Thompson <leemthompo@gmail.com>
Co-authored-by: Martijn Laarman <Mpdreamz@gmail.com>
Co-authored-by: István Zoltán Szabó <szabosteve@gmail.com>
2025-02-27 17:56:14 +01:00

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ATAN2 [esql-atan2]

Syntax

:::{image} ../../../../../images/atan2.svg :alt: Embedded :class: text-center :::

Parameters

y_coordinate
y coordinate. If null, the function returns null.
x_coordinate
x coordinate. If null, the function returns null.

Description

The angle between the positive x-axis and the ray from the origin to the point (x , y) in the Cartesian plane, expressed in radians.

Supported types

y_coordinate x_coordinate result
double double double
double integer double
double long double
double unsigned_long double
integer double double
integer integer double
integer long double
integer unsigned_long double
long double double
long integer double
long long double
long unsigned_long double
unsigned_long double double
unsigned_long integer double
unsigned_long long double
unsigned_long unsigned_long double

Example

ROW y=12.9, x=.6
| EVAL atan2=ATAN2(y, x)
y:double x:double atan2:double
12.9 0.6 1.5243181954438936