rkeops (version 2.2.2)

atan2: Element-wise 2-argument arc-tangent operation.

Description

Symbolic element-wise 2-argument arc-tangent operation for LazyTensor objects or standard element-wise 2-argument arc-tangent operation otherwise.

Usage

atan2(x, y)

Value

See value of atan2.default() or atan2.LazyTensor().

Arguments

x, y

input for atan2.default() or atan2.LazyTensor().

Author

Chloe Serre-Combe, Amelie Vernay

Details

If x is a LazyTensor, see atan2.LazyTensor(), else see atan2.default().

Note: the arc-tangent of two arguments atan2(y, x) returns the angle between the x-axis and the vector from the origin to (x, y), i.e., for positive arguments atan2(y, x) == atan(y/x).

See Also

atan2.default(), atan2.LazyTensor()

Examples

if (FALSE) {
# R base operation
atan2(0, 1)
atan2(1, 0)
# LazyTensor symbolic element-wise 2-argument arc-tangent
x <- matrix(runif(150 * 3), 150, 3) # arbitrary R matrix, 150 rows, 3 columns
y <- matrix(runif(250 * 3), 250, 3) # arbitrary R matrix, 250 rows, 3 columns
x_i <- LazyTensor(x, index = 'i')   # creating LazyTensor from matrix x, 
                                    # indexed by 'i'
y_j <- LazyTensor(y, index = 'j')   # creating LazyTensor from matrix y, 
                                    # indexed by 'j'
Atan2_xy <- atan2(x_i, y_j)         # symbolic matrix
}