na.warn: Handle missing values with a warning

In modelr: Modelling Functions that Work with the Pipe

Handle missing values with a warning

Description

This NA handler ensures that those models that support the na.action parameter do not silently drop missing values. It wraps around stats::na.exclude() so that there is one prediction/residual for input row. To apply it globally, run options(na.action = na.warn).

Usage

na.warn(object)

Arguments

object

A data frame

Examples

df <- tibble::tibble(
  x = 1:10,
  y = c(5.1, 9.7, NA, 17.4, 21.2, 26.6, 27.9, NA, 36.3, 40.4)
)
# Default behaviour is to silently drop
m1 <- lm(y ~ x, data = df)
resid(m1)

# Use na.action = na.warn to warn
m2 <- lm(y ~ x, data = df, na.action = na.warn)
resid(m2)

modelr documentation built on March 31, 2023, 5:20 p.m.