Vector Element Update in Simulink

My Simulink simulation contains a fixed output vector signal [256 elements] which only a few elements of it is updated at a time depending on given the phase of the simulation.

For example I'd like to only update elements [5 to 10] in the fixed [256 element] output vector and don't re-arrange or change the elements that are not used in the output vector. I've noticed that the "Selector" block only filters certain elements of a vector or rearranges it. Unfortunately I haven't come across any library blocks which does the opposite, simply write a value in a defined element of a vector signal.

I've tried a few tricks with the "Merge" block though this block simply adds elements to the existing [256] element vector and doesn't over-write certain elements.

My thoughts are that I may have to create an embedded matlab function to do this vector element reassigning function.

Thought I check with the experts to see if there is an easier way to implement this.

I appreciate your help!

Nima

[Azzi Abdelmalek]

it's not clear for me

Answer 1

[TAB]

Split your matrix in different part, alter the part which you want, then Concatenate all parts again in one matrix.

In your case

• Use 3 selector blocks to split the [265 element vector] into [1:4 element], [5:10 element] & [11:256 element].
• Now do your required operation on [5:10 element] vector generated from 2nd selector block.
• Finally merge all 3 into single vector using Vector Concatenate block.