Inverse cumulative distribution function

The logistic function (logistic distribution CDF) has another important property: each x input value is transformed to a unique value. That means that the transformation can be reversed. The logit function is the name for the inverse logistic function, which is also the logistic distribution inverse cumulative distribution function. (All three terms mean exactly the same thing.)

The logit function takes values between zero and one, and returns values between minus infinity and infinity.

dplyr and ggplot2 are loaded.

Deze oefening maakt deel uit van de cursus

Intermediate Regression in R

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Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

logistic_distn_inv_cdf <- tibble(
  # Make a seq from 0.001 to 0.999 in steps of 0.001
  p = ___,
  # Transform with built-in logistic inverse CDF
  logit_p = ___,
  # Transform with manual logit
  logit_p_man = ___
) 

# Check that each logistic function gives the same results
all.equal(
  ___,
  ___
)

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