y = expstretched(p, x, [y]) : Exponential decay
iFunc/expstretched Stretched exponential decay fitting function
Tau is the expeonential decay parameter, in inverse 'x' units.
y=p(4)+p(1)*exp(-(x/p(2)).^p(3));
expstretched(decay) creates a model with specified decay constant
expstretched([ parameters ]) creates a model with specified model parameters
input: p: Stretched exponential decay model parameters (double)
p = [ Amplitude Tau 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=expstretched([1 0 1 1], -10:10); or plot(expstretched)
I will not buy this exponential; it is stretched.
<http://en.wikipedia.org/wiki/Dirty_Hungarian_Phrasebook>
Version: Nov. 26, 2018
See also iData, iFunc/fits, iFunc/plot
(c) E.Farhi, ILL. License: EUPL.