Store data if the condition is true

[LandBelenky]

Hmm...

That is definitely not what you described in your original post.

Try this.

[lywillc]

Thanks.  I am trying to understand how your model works (why is the shift register needed etc?)

[LandBelenky]

The shift register holds the output array as it is getting built up. It starts with an empty array.  On each loop, it checks to see if the element is the same as the previous.  If the element is the same, nothing is done; the Select function simply transfers the old array unmodified to the next iteration.

If the element is not the same, the new element (and index) are concatenated to the array and the appended array is transferred to the next iteration.

[lywillc]

I also tried to udnerstand why the "auto index tunnel" is used (I didn't find this term in "Detailed Help" window).  Thanks.

[lywillc]

Following my previous question on "Auto Index Tunnel".  Does it use to excute the for loop according to the size of the array?