atan2(Decimal, Decimal) - Amazon IoT Analytics
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

End of support notice: On December 15, 2025, Amazon will end support for Amazon IoT Analytics. After December 15, 2025, you will no longer be able to access the Amazon IoT Analytics console, or Amazon IoT Analytics resources. For more information, visit this Amazon IoT Analytics end of support.

atan2(Decimal, Decimal)

Returns the angle, in radians, between the positive x-axis and the (x, y) point defined in the two arguments. The angle is positive for counter-clockwise angles (upper half-plane, y > 0), and negative for clockwise angles Decimal arguments are rounded to double precision before function application.

Examples: atan(1, 0) = 1.5707963267948966

Argument type Argument type Result

Int / Decimal

Int / Decimal

Decimal (with double precision), the angle between the x-axis and the specified (x,y) point

Int / Decimal / String

Int / Decimal / String

Decimal, the inverse tangent of the point described. If a string cannot be converted, the result is Undefined.

Other Value

Other Value

Undefined.