Simulink write to array index

Goodmorning,

Which block should be used to write to a specific index of an array in Simulink.

Eg. I have a signal with an array [2, 1, 8, 5] and I want to write a 2 to index 3, keeping the other values equal. This should result in an array [2,1,3,5].

Should this really be done by a matlab function?

Kr, BV

Answer 1

[Birdman]

Of course it can be done. Check the attached files.

[Antony Smith]

I s there really no 'inverse' block to the "Index Vector" block??

Seems like quite an oversight on behalf of simulink functionality?

Answer 2

[TAB]

Use Assignment block.

OR

Split the array signal using Demux. Then connect the all (except desired index to change) outputs to Mux. Connect other signal at desired index.