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Calculate circularity of a 2D shape

Source: R/circularity.R
circularity.Rd

The perimeter of the 2D shape is divided by the perimeter of a circle with the same area as the shape. The more irregular the shape is, the closer the output value is to zero. The closer the shape is to a circle, the closer the output value is to 1.

Usage

circularity(data)

Arguments

data

A data frame with the first two columns x and y coordinates, respectively.

Value

A value between 0 (infinitely irregular) and 1 (a perfect circle).

See also

sphericity()

Examples

mcap_2d <- mesh_to_2d(mcap)
plot(mcap_2d, asp=1)

circularity(mcap_2d)
#> [1] 0.6085393

circ <- sim_circle() # simulate xy coordinates for a circle
plot(circ, asp=1)

circularity(circ)
#> [1] 0.9998321