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For input values between -1 and 1 inclusive, this function returns the angle in radians whose tangent value is the input. This function is the inverse of the tangent function. The value can be a Decimal or Integer literal or a reference to a column containing numeric values. |
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NOTE: While this function returns values outside of the range -1 <= x <= 1, those values are not considered valid. |
For more information on the tangent function, see TAN Function.
arc cotangent:
| Input range | Output computation |
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| x>0 | atan(1/x) |
| x<=0 | atan(1/x) + PI()
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Numeric literal example:
| D lang syntax |
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| RawWrangle | true |
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| Type | ref |
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| showNote | true |
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| WrangleText | derive type:single value: atan(0.5) |
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atan(0.5) |
Output: Returns the computation of the arc tangent of 0.5. Output value is in radians.
Column reference example:
| D lang syntax |
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| RawWrangle | true |
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| Type | ref |
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| showNote | true |
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| WrangleText | derive type:single value: atan(X) as: atanX' |
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|
atan(X) |
Output: Returns the arc tangent of the values in X column.
| D lang syntax |
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| RawWrangle | true |
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| Type | syntax |
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| showNote | true |
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| WrangleText | derive type:single value: atan(numeric_value) |
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atan(numeric_value) |
| Argument | Required? | Data Type | Description |
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| numeric_value | Y | string, decimal, or integer | Name of column, Decimal or Integer literal, or function returning those types to apply to the function |
numeric_value
Name of the column, Integer or Decimal literal, or function returning that data type to apply to the function.
- Missing input values generate missing results.
- Literal numeric values should not be quoted. Quoted values are treated as strings.
- Multiple columns and wildcards are not supported.
| Required? | Data Type | Example Value |
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| Yes | String (column reference) or Integer or Decimal literal | 0.5 |
Example - Trigonometry Arc functions
| Include Page |
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| EXAMPLE - Trigonometry Arc Functions |
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| EXAMPLE - Trigonometry Arc Functions |
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