How to specify initial conditions in a differential equation editor (DEE) in Simulink with an m-file?

Hello,

Does anybody know how to specify initial conditions (I.C.s) of the variables (x(.)) in a differential equation editor (DEE) in Simulink with an m-file? I am using DEE to solve a set of ordinary differential equations (ODEs), and the I.C.s of the x(.) are dependent on the input parameters (u(.)), which are constants. I know how to specify the u(.) with an m-file so I can change u(.) quite easily. However, every time I changed u(.), I also had to change the I.C.s of x(.) manually, which is not very convenient because I cannot write a loop in this situation. Can somebody help me? Any help would be much appreciated.

Best,

Chia-Hung