How to store continuous data from Matlab GUI.

Hi,

I have built a matlab gui that read the data obtaining from Simulink. The matlab gui do some calculation and store it in some variables. Now, I would like to store the data of those variables from matlab gui.

I have tried to use assignin, but this function only save the last data(a scalar), but not data changing with time.

Please let me know are there any function that allow me to store the data according to time.

Thank you.