ELLRAD Average and instantaneous ellipse radius. R=ELLRAD(KAPPA,LAMBDA,PHI,STR) where KAPPA and LAMBDA are the amplitude and linearity of a time-varying ellise, and PHI is its time-varying phase, returns various measures of the ellipse 'radius'. STR determines the radius quantity to be output. STR Symbol Description ---------------------------------------------------------------- 'geo' RM Geometric mean radius = SQRT(A*B) 'ave' RBAR Period-averaged distance from the origin 'ins' RI Instantaneous distance from the origin See Lilly and Gascard (2006) for details. If STR is omitted, the geometric mean radius is returned by default. RM=ELLRAD(KAPPA,LAMBDA) with PHI omitted also works for computing RM. ____________________________________________________________________ Cell array input/output If ELLRAD is given cell array input, it returns cell array output. Thus KAPPA, LAMBDA, and PHI may each be cell arrays of the same size, where each element in the cell array is a numerical array. The output variables will be also cell arrays of this size. ____________________________________________________________________ See also ELLVEL, ELLPARAMS, ELLDIFF. Usage: rm=ellrad(kappa,lambda); rbar=ellrad(kappa,lambda,phi,'average'); ri=ellrad(kappa,lambda,phi,'instantaneous'); __________________________________________________________________ This is part of JLAB --- type 'help jlab' for more information (C) 2005--2014 J.M. Lilly --- type 'help jlab_license' for details