fde12 function is not found

I was trying to solve a ODE with fractional derivative using fde12 function. My codes are:

a = 1; mu = 4;
fdefun = @(t,y) [a-(mu+1)*y(1)+y(1)^2*y(2); mu*y(1)-y(1)^2*y(2)];

alpha = 0.8;
t0 = 0 ; tfinal = 100 ; y0 = [ 0.2 ; 0.03];
h = 2^(-6);

[t, y_fde12] = fde12(alpha,fdefun,t0,tfinal,y0,h);

However, the error is:

'fde12' is not found in the current folder or on the MATLAB path, but exists in:

C:\Users\zhang\AppData\Local\Temp\AweZip\Temp1\AweZip5\Gappappa's Codes

Change the MATLAB current folder or add its folder to the MATLAB path.

Error in fde12function (line 12)

[t, y_fde12] = fde12(alpha,fdefun,t0,tfinal,y0,h);

I was thinking fde12 is a inbuilt function... but it is not working...

Please help... Thanks

Answer 1

[Navya Singam]

Hi,

fde12 is not a MATLAB inbuilt function. It is available as a part of the File Exchange submission. You can download and add it to the MATLAB path and use it as a normal function.

[Wei Zhang]

Thanks!