ATAN macro

The ATAN macro is available only in Unica Campaign.

Syntax

ATAN(data [, units_keyword])

Parameters

data

The numerical values to compute the arc tangent of. This can be a constant value, a column, a cell range, or an expression evaluating to any of the above. For the format definition of data, see the "Macro Function Parameters" section in the chapter in this guide for your product.

units_keyword

This optional keyword determines whether the input values and results are interpreted as degrees or radians. Select one of the following:

RADIAN - Performs the calculations in radians (default)

DEGREE - Performs the calculations in degrees

If this parameter is not specified, the default is radians. (To convert from radians to degrees, divide by PI and multiply by 180.)

For more details on using keywords in Unica Campaign, see Format Specifications.

Description

ATAN calculates the arctangent of the values in the specified data range. The arctangent is the angle whose tangent is the contents of each cell. ATAN returns one new column for each input column, each containing the arctangent of numbers in the corresponding input column.

If the keyword RADIAN is used, ATAN returns values in the range -π/2 to π/2. If the keyword DEGREE is used, ATAN returns values in the range -90 to 90.

Examples


`TEMP = ATAN(1)` or `TEMP = ATAN(1, 0)` or `TEMP = ATAN(1, RADIAN)` Creates a new column named `TEMP` containing the value `0.785` ( radians).
`TEMP = ATAN(1, 1)` or `TEMP = ATAN(1, DEGREE)` Creates a new column named `TEMP` containing the value `45` (degrees).
`TEMP = ATAN(V1)` Creates a new column named `TEMP`, where each value is the arctangent (in radians) of the contents of column `V1`.
`TEMP = ATAN(V1:V3, 1)` Creates three new columns named `TEMP`, `VX`, and `VY`. The values in the `TEMP` column are the arctangents of the contents of column `V1`, the values of the `VX` column are the arctangents of the contents of column `V2`, and the values of the `VY` column are the arctangents of the contents of column `V3`. All values are in degrees.
`TEMP = ATAN(V1[10:20])` Creates a new column named `TEMP`, where the first 11 cells contain the arctangents of the values in rows 10-20 of column `V1` (in radians). The other cells in `TEMP` are empty.
`TEMP = ATAN(V1[1:5]:V2)` Creates two new columns named `TEMP` and `VX`, each with values in rows 1-5 (the other cells are empty). The values in column `TEMP` are the arctangents of the corresponding rows of column `V1`, and the values in column `VX` are the arctangents of the corresponding rows of column `V2`. All values are in radians.

Related functions


Function	Description
`ACOS`	Computes the arccosine of the contents of the specified data range
`ASIN`	Computes the arcsine of the contents of the specified data range
`ATAN`	Computes the arctangent of the contents of the specified data range
`TAN`	Computes the tangent of the contents of the specified data range