Element-wise if-else function.

Symbolic element-wise if-else function (ternary operation) for LazyTensor objects.

Usage

# S3 method for LazyTensor
ifelse(test, yes, no)

Arguments

test, yes, no

a LazyTensor, a vector of numeric values, or a scalar value.

Value

An object of class LazyTensor.

Details

If test is a LazyTensor, ifelse(test, yes, no) returns a LazyTensor that encodes, symbolically, yes if test >= 0 and no if test < 0. Broadcasting rules apply. yes and no may be fixed integers or floats, or other LazyTensor.

Note: If yes and no are not scalar values, these should have the same inner dimension as test.

Author

Chloe Serre-Combe, Amelie Vernay

Examples

if (FALSE) {
# basic example
D <- 3
M <- 100
N <- 150
P <- 200
x <- matrix(runif(M * D), M, D)
y <- matrix(runif(N * D), N, D)
z <- matrix(runif(P * D), P, D)
x_i <- LazyTensor(x, index = 'i')
y_j <- LazyTensor(y, index = 'j')
z_i <- LazyTensor(z, index = 'i')

# call ifelse function
if_else_xyz <- ifelse(x_i, y_j, z_i)
}