i need a block for save a value for comparison with itself in during simulation 1

[JavadM]

Hello all.
i am new to matlab and simulink. i want to sample a variable at the time and as the solution progresses compare new value to the older one.
is any block for that?



thanks
matlab and simulink 2015a

 

[FeX32]

You can use the Memory block to delay the time step by 1 time step. You can then compare in many ways.