Fractional order system state space

Does anyone know how to apply a fractional order system state space representation in MATLAB?

[Khaled Bin Gaufan]

u can use this command foss(A,B,C,D,alpha)

%simple example
A=[1 2; 3 4];
B=[1;0];
C=[0 1];
D=0;
alpha=0.5 % fractional order 
Sys=foss(A,B,C,D,alpha)

[Walter Roberson]

That appears to be part of the File Exchange contribution "FOTF Toolbox"

[Walter Roberson]

or FOMCON Toolbox perhaps, https://www.mathworks.com/matlabcentral/fileexchange/66323-fomcon-toolbox-for-matlab

Answer 1

[Roshni Garnayak]

Presently MATLAB doesn’t support the representation of fractional order state space models.

Answer 2

[Muhammad Zeeshan Khan]

A=[1 2; 3 4];
B=[1;0];
C=[0 1];
D=0;
alpha=0.5 % fractional order 
Sys=foss(A,B,C,D,alpha)

[Walter Roberson]

This appears to refer to the File Exchange contribution https://www.mathworks.com/matlabcentral/fileexchange/66323-fomcon-toolbox-for-matlab