22 lines
719 B
Matlab
22 lines
719 B
Matlab
function dy=glfdiff2(y,t,gam,p)
|
|
% glfdiff2 - evaluation of O(h^p) GL derivatives, not recommended
|
|
%
|
|
% dy=glfdiff2(y,t,gam,p)
|
|
%
|
|
% y - the samples of the function handle of the original function
|
|
% t - the time vector
|
|
% gam - the fractional order
|
|
% p - the order for the precision setting
|
|
% dy - the fractional-order derivatives, or integrals if gam<0
|
|
|
|
% Copyright (c) Dingyu Xue, Northeastern University, China
|
|
% Last modified 28 March, 2017
|
|
% Last modified 18 May, 2022
|
|
arguments, y(:,1), t(:,1), gam(1,1)
|
|
p(1,1){mustBePositive, mustBeInteger}=5
|
|
end
|
|
g=double(genfunc(p)); [y,h,n]=fdiffcom(y,t);
|
|
w=get_vecw(gam,n,g); dy=zeros(n,1);
|
|
for i=1:n, dy(i)=w(1:i)*y(i:-1:1)/h^gam; end
|
|
end
|