Fractal Dimension Index(vector data) — vm_p

This function allows you to calculate index fractal dimension index. The index is based on the patch perimeter and the patch area and describes the patch complexity.

Usage

vm_p_frac(landscape, class_col = NULL, patch_col = NULL)

Arguments

landscape: the input landscape image,
class_col: the name of the class column of the input landscape
patch_col: the name of the id column of the input landscape

Value

the function returns tibble with the calculated values in column "value", this function returns also some important information such as level, class, patch id and metric name.

Details

2 * log(perimeter) / log(area)

Examples

vm_p_frac(vector_patches, "class", "patch")
#> # A tibble: 40 × 5
#>    level class id    metric value
#>    <chr> <chr> <chr> <chr>  <dbl>
#>  1 patch 1     11    frac    1.24
#>  2 patch 1     12    frac    1.11
#>  3 patch 1     13    frac    1.20
#>  4 patch 1     14    frac    1.32
#>  5 patch 1     15    frac    1   
#>  6 patch 1     16    frac    1   
#>  7 patch 1     17    frac    1   
#>  8 patch 1     18    frac    1.02
#>  9 patch 1     19    frac    1   
#> 10 patch 1     20    frac    1   
#> # ℹ 30 more rows