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Function References
Reference for all built-in functions
Functions
A
atan

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atan

Syntax

atan(X)

Parameters

X is a scalar/vector/matrix/table.

Details

The inverse tangent (arctan) function.

Difference from Python TA-Lib’s ATAN: Both functions calculate the inverse tangent and return radians. TA-Lib’s ATAN(close) is a Math Transform function for vector input and returns an array, whereas DolphinDB’s atan(X) accepts a scalar, vector, matrix, or table and preserves the input form.

Examples

atan 0.000000 1.557408 -2.185040;
// output: [0,1,-1.141593]

Related functions: asin, acos, sin, cos, tan, asinh, acosh, atanh, sinh, cosh, tanh