Momocs (version 1.1.6)

coo_calliper: Calculates the calliper length

Description

Also called the Feret's diameter, the longest distance between two points of the shape provided.

Usage

coo_calliper(coo, arr.ind = FALSE)

Arguments

coo

a matrix of (x; y) coordinates.

arr.ind

logical, see below.

Value

numeric, the centroid size. If arr.ind=TRUE, a list with the calliper length $length and the two points $arr.ind. If arr.ind=TRUE, only the calliper length as a numeric.

See Also

Other coo_ utilities: coo_aligncalliper, coo_alignminradius, coo_alignxax, coo_align, coo_baseline, coo_bookstein, coo_boundingbox, coo_centdist, coo_center, coo_centpos, coo_close, coo_down, coo_dxy, coo_extract, coo_flipx, coo_force2close, coo_interpolate, coo_jitter, coo_left, coo_nb, coo_perimcum, coo_perimpts, coo_perim, coo_rev, coo_right, coo_rotatecenter, coo_rotate, coo_samplerr, coo_sample, coo_scalex, coo_scale, coo_shearx, coo_slice, coo_slidedirection, coo_slidegap, coo_slide, coo_smoothcurve, coo_smooth, coo_template, coo_trans, coo_trimbottom, coo_trimtop, coo_trim, coo_up, is_clockwise, is_closed, is_equallyspacedradii

Examples

b <- bot[1]
coo_calliper(b)
p <- coo_calliper(b, arr.ind=TRUE)
p$length
ids <- p$arr.ind
coo_plot(b)
segments(b[ids[1], 1], b[ids[1], 2], b[ids[2], 1], b[ids[2], 2], lty=2)