coeff.sel

<code>numeric</code>. The number of harmonics to retain.

retain

<code>numeric</code>. The number of harmonics to drop

drop

<code>numeric</code>. The maximum harmonic rank.

nb.h

<code>numeric</code>. Must be set to 2 for <code>rfourier</code> and <code>tfourier</code> were used.

<code>coeff.sel</code> helps to select a given number of harmonics by returning their indices when arranged as a numeric vector. For instance, harmonic coefficients are arranged in the <code>@coeff</code> slot of <code>Coe</code>-objects in that way: $$A_1, \dots, A_n, B_1, \dots, B_n, C_1, \dots, C_n, D_1, \dots, D-n$$ after an elliptical Fourier analysis (see <a href="/link/eFourier?package=Momocs&version=0.2-03" rd-options="" data-mini-rdoc="Momocs::eFourier">eFourier</a> and <a href="/link/efourier?package=Momocs&version=0.2-03" rd-options="" data-mini-rdoc="Momocs::efourier">efourier</a>) while $$C_n and D_n$$ harmonic are absent for radii variation and tangent angle approaches (see <a href="/link/rfourier?package=Momocs&version=0.2-03" rd-options="" data-mini-rdoc="Momocs::rfourier">rfourier</a> and <a href="/link/tfourier?package=Momocs&version=0.2-03" rd-options="" data-mini-rdoc="Momocs::tfourier">tfourier</a> respectively). . This function is used internally but might be of interest elwewhere.

utilities

Momocs is intended to ease and popularize shape analysis
        of outlines (especially using elliptical Fourier analysis). It
        mostly hinges on the functions developed in Morphometrics with
        R (Claude, 2008). From outline extraction of images and
        elliptical Fourier calculation to multivariate analysis and the
        visualization of transformations within the morphological
        space, Momocs provides a complete and convenient toolkit to
        specialists within every field that are, or may be, interested
        in morphological comparisons of outlines.

coeff.sel: Helps to select a given number of harmonics from a numerical vector.

Description

Usage

Arguments

Value

Examples