vm_p_perarea.RdThis function allows you to calculate the ratio between the patch perimeter and area. The ratio describes the patch complexity in a straightforward way.
vm_p_perarea(landscape, class_col = NULL, patch_col = NULL)the input landscape image,
the name of the class column of the input landscape
the name of the id column of the input landscape
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.
vm_p_perarea(vector_patches, "class", "patch")
#> # A tibble: 40 × 5
#> level class id metric value
#> <chr> <chr> <chr> <chr> <dbl>
#> 1 patch 1 11 perarea 1.15
#> 2 patch 1 12 perarea 0.789
#> 3 patch 1 13 perarea 1.2
#> 4 patch 1 14 perarea 2.5
#> 5 patch 1 15 perarea 4
#> 6 patch 1 16 perarea 4
#> 7 patch 1 17 perarea 4
#> 8 patch 1 18 perarea 1.67
#> 9 patch 1 19 perarea 4
#> 10 patch 1 20 perarea 4
#> # ℹ 30 more rows