Possible value range for variogram_range?

Our docs say:

Lines 19 to 21 in 11ec401

    
           #' @param variogram_range A numeric value greater than zero. Larger values 
        
           #'  reduce the likelihood of empty regions in the parameter space. Only used 
        
           #'  for `type = "max_entropy"`.

It's passed to DiceDesign::dmaxDesign()

dials/R/space_filling.R

Lines 409 to 416 in 11ec401

    
           sfd <- 
        
             DiceDesign::dmaxDesign( 
        
               n = size, 
        
               dimension = length(params), 
        
               range = variogram_range, 
        
               niter_max = iter, 
        
               seed = sample.int(10^5, 1) 
        
             )

which itself does allow the full range. Do we also want to allow that?

The underlying function does not have a default:

args(DiceDesign::dmaxDesign)
#> function (n, dimension, range, niter_max = 1000, seed = NULL) 
#> NULL

^{Created on 2026-01-29 with reprex v2.1.1}

I came up with 1/2 for variogram_range by looking at different values with a 2D design and seeing what appeared to give the best results.

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Possible value range for `variogram_range`? #416

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	#' @param variogram_range A numeric value greater than zero. Larger values
	#' reduce the likelihood of empty regions in the parameter space. Only used
	#' for `type = "max_entropy"`.

	sfd <-
	DiceDesign::dmaxDesign(
	n = size,
	dimension = length(params),
	range = variogram_range,
	niter_max = iter,
	seed = sample.int(10^5, 1)
	)

Possible value range for variogram_range? #416

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topepo commented on Jan 29, 2026

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Possible value range for `variogram_range`? #416