tests/testthat/_snaps/rfoo.md

In gratia: Graceful 'ggplot'-Based Graphics and Other Functions for GAMs Fitted Using 'mgcv'

rtw works with scalar p and phi

Code
  withr::with_seed(seed = 34657, rtw(mu = runif(10, min = 0, max = 10), p = 1.5,
  phi = 1.1))
Output
   [1] 23.5188629  1.5611091  0.2695351  1.2625794  2.4824889  5.4061374
   [7]  5.1371450  0.6377823  2.8042417  5.9204689

rtw works with vector p and phi

Code
  withr::with_seed(seed = 34657, rtw(mu = runif(10, min = 0, max = 10), p = runif(
    10, min = 1, max = 2), phi = runif(10, 1, 2)))
Output
   [1]  1.6760667 26.0809763  3.0301311  0.7551897  7.9348421  4.8814385
   [7] 13.6470470  3.2858650  5.6785218 73.8935738

rtw fails with negative mu

Code
  rtw(mu = -2, p = 1.1, phi = 1.1)
Condition
  Error in `rtw()`:
  ! mean 'mu' must be non-negative

rtw fails with p outside below range

Code
  rtw(mu = 2, p = 1L, phi = 1.1)
Condition
  Error in `rtw()`:
  ! 'p' must be in interval (1, 2)

rtw fails with p outside above range

Code
  rtw(mu = 2, p = 3L, phi = 1.1)
Condition
  Error in `rtw()`:
  ! 'p' must be in interval (1, 2)

rtw fails with phi negative

Code
  rtw(mu = 2, p = 1.5, phi = -1)
Condition
  Error in `rtw()`:
  ! scale parameter 'phi' must be positive

gratia documentation built on Feb. 7, 2026, 9:06 a.m.