Input a system of DE's with Matlab GUI -

does know how input system of differential equations (or part of system) matlab gui , put m function file.

i've tried this:

pod = vectorize(get(handles.edit35,'string')); 

and in function file:

function dy = myeq1(~,y) dy=zeros(2,1); u=y(1); v=y(2); global a11 a12 a13 a21 a22 a23 s k pod dy(1) = a11*u - a12.*pod; dy(2) = a21*v - a22.*pod; 

it not working.

my example of pod function:

pod equal u*v/2; 

promt how right, please. thank you.