These functions calculate fractional or complex order derivatives, when the order changes with time. Riemann-Liouville, Caputo and Grünwald-Letnikoff definitions are provided; the three variations considered by Lorenzo and Hartley are considered. Fuzzy supervised implementations in Simulink, based upon Oustaloup's Crone approximations, are also provided.
problem occured when using constant alpha(t)=1 in vod1RL ,solved by skipping the integration part and going straight to differentiation.
please consider updating this valuable file.
thanks for sharing
I can not use vodRL and here is the error message: Index exceeds matrix dimensions.
Files for variable order, linear phase Crone approximations have been added.
1) A nasty bug affecting variable complex order derivatives was fixed. 2) C^\infty interpolation of zeros and poles now uses exact Crone formulas only.
Required function gamma.m (from http://www.mathworks.com/matlabcentral/fileexchange/3572) now included.
Simulink files for complex orders now provided.