Rescale Values in a Patternogram

It rescales the dissimilarity values in a patternogram object to a specified range. This allows for easier comparison and interpretation of various patternograms.

rescale_patternogram(x, method = c("minmax"), by = "id", ...)

Arguments

x

A patternogram object

method

Scaling method, currently only "minmax" is implemented

by

Optional grouping variable (e.g., "id" or "group") to apply scaling within groups

...

Additional arguments for future extensions

Value

A patternogram object with rescaled dissimilarity values (0 to 1 for "minmax" method)

Examples

r = terra::rast(system.file("ex/elev.tif", package = "terra"))
pr = patternogram(r)
pr
#> # A patternogram: 15 × 3
#>       np  dist dissimilarity
#>  * <int> <dbl>         <dbl>
#>  1  2976  2300          45.6
#>  2  7890  6895          58.5
#>  3 11617 11495          64.2
#>  4 14187 16100          69.2
#>  5 14915 20700          73.0
#>  6 14826 25300          77.0
#>  7 13697 29900          85.1
#>  8 11816 34500          95.0
#>  9  9731 39100         110. 
#> 10  7961 43700         130. 
#> 11  5740 48300         146. 
#> 12  3962 52900         158. 
#> 13  2523 57450         171. 
#> 14  1445 62000         181. 
#> 15   876 66600         195. 
pr_scaled = rescale_patternogram(pr)
pr_scaled
#> # A patternogram: 15 × 3
#>       np  dist dissimilarity
#>    <int> <dbl>         <dbl>
#>  1  2976  2300        0     
#>  2  7890  6895        0.0866
#>  3 11617 11495        0.124 
#>  4 14187 16100        0.158 
#>  5 14915 20700        0.184 
#>  6 14826 25300        0.210 
#>  7 13697 29900        0.265 
#>  8 11816 34500        0.331 
#>  9  9731 39100        0.430 
#> 10  7961 43700        0.567 
#> 11  5740 48300        0.673 
#> 12  3962 52900        0.757 
#> 13  2523 57450        0.841 
#> 14  1445 62000        0.908 
#> 15   876 66600        1     
plot(pr_scaled)