Declare cross-fitted contraction registration for GazeWeave — gaze_warp_contraction • eyesim

Declare cross-fitted contraction registration for GazeWeave

Usage

gaze_warp_contraction(
  center = "screen",
  translation = TRUE,
  fit_by = NULL,
  shrink = 1e-06
)

Arguments

center: Either `"screen"` or a finite two-element numeric vector.
translation: Whether to estimate translation in addition to isotropic scale.
fit_by: Optional columns defining separate warp strata, such as `"participant"`.
shrink: Positive stabilization term for moment ratios.

Value

A `gaze_warp_spec` object.

Examples

# Contraction toward the screen centre with a free translation.
gaze_warp_contraction(center = "screen", translation = TRUE)
#> $type
#> [1] "contraction"
#> 
#> $center
#> [1] "screen"
#> 
#> $translation
#> [1] TRUE
#> 
#> $fit_by
#> NULL
#> 
#> $shrink
#> [1] 1e-06
#> 
#> attr(,"class")
#> [1] "gaze_warp_spec" "list"