COMPARE NEXT VALUE WITH PREVIOUS VALUE

Hi, I am using simulink. I have many values of x from a function. (1,2,3,4,5,6,7......)

I want to compare previous value with new coming value. Can you help me.

a function of coming value is f(x). a function of previous value is f(x-1).

I want f(x)/f(x-1) = Coming value / previous value.

Which block i use to store previous value. I cannot use DELAY BLOCK becuase it changes value. I tried to use memory block but not succeeded. I hope you can solve it. Thanks

[TAB]

I cannot use DELAY BLOCK becuase it changes value....?????

If input to the unit delay block will change, its output will also change to hold the latest value.

What exactly you want to do ?

Answer 1

[Azzi Abdelmalek]

You can use the unit delay block as well the memory block. Your problem is maybe the settings of these blocks, particularly the sample time. Set the sample time to -1 (inherited). Also another thing, after simulation, check the input and output of your unit delay block