Pipe-friendly Arithmetic Helpers in doBy

Søren Højsgaard

The doBy package includes a suite of simple, pipe-friendly arithmetic helper functions that make common transformations clearer and more expressive when using the native R pipe (|>).

These helpers let you write transformations in readable pipelines without nested or hard-to-read expressions. All functions are vectorized and work with scalars or numeric vectors.

---

Available functions

• add(): add a constant
• subtract(): subtract a constant
• mult(): multiply by a constant
• divide(): divide by a constant
• reciprocal(): compute 1/x
• pow(): raise to a power

---

Load doBy

library(doBy)
x <- c(1, 2, 3)

# Addition
x |> add(5)
# [1] 6 7 8

# Subtraction
x |> subtract(1)
# [1] 0 1 2

# Multiplication
x |> mult(10)
# [1] 10 20 30

# Division
x |> divide(2)
# [1] 0.5 1.0 1.5

# Reciprocal
x |> reciprocal()
# [1] 1.0000000 0.5000000 0.3333333

# Power
x |> pow(2)
# [1] 1 4 9
x |>
  mult(2) |>
  add(3) |>
  reciprocal()