y = powerlaw(p, x, [y]) : power law model
iFunc/powerlaw power law fitting function
y = p(1)*(x - p(2))^p(3) + p(4);
poisson(centre) creates a model with a specified centre
poisson([ parameters ]) creates a model with specified model parameters
input: p: power law model parameters (double)
p = [ Amplitude Centre Exponent BackGround ]
or 'guess'
x: axis (double)
y: when values are given and p='guess', a guess of the parameters is performed (double)
output: y: model value
ex: y=powerlaw([1 0 1 1], -10:10); or plot(powerlaw);
Version: Nov. 26, 2018
See also iFunc, iFunc/fits, iFunc/plot
(c) E.Farhi, ILL. License: EUPL.