Using read write data meory block using indirect addressing - SIMULINK

I need a storage array data memory - block - effectively circular buffer -- write 1 entry at a time -- but I have to continually calculate the mean

Currently, I have set up a data memory block - initialized with 1: 1024 and have hardcoded a read memory block accessing all 1024 -- which I iuse to calculate a mean - No real issue (I think)

For simplisticity -- I have a constand writing into a write data memory block

I can adjust the write data memory block to write into any hard coded element of the data memory block e.g. A(1) A(50) etc

but I want to use the data memory block as a circular arry -- so I want to use A(posn) where posn is a variable that is changing over time

I can't find how to make this work any where on the web -- just how to write one element into the block

it is so simplistic that I must be missing something obvious

Trying to avoid globals - but if thats a solution -- not getting that right either :-(

Answer 1

[Fangjun Jiang]

Buffer block

Assignment block

[Michael]

Thanks

Not heard of buffering before -- however I have things already in meory and want to use as a buffer, rather than trying to make a buffer -- I could use that -- but not here

The assignment stream sounds like I have to pull everything out of the buffer - change 1 things as I put things back in

Found a comment else where that the overhead of the way that was impliment in simulink would kill me

That answer also suggested -- don;'t do it -- use a mathlab function -- so that is what I did

Thanks anyway

[Fangjun Jiang]

If you are open to use the MATLAB Function block, I would agree that is the best approach for your task.