Adding array values with previous value

[sundas]

Hello,

I have a while loop in which i am getting 5000 samples (values) on each iteration of loop. i want to hold that samples and needs to add that 5000 values with new 5000 samples.

In simple words, i have 1D-array which is updating on each iteration. i just simply wants to add new array elements with previous one. So that on last iteration i get the summed 1D array with 5000 values.

Attached is the VI which i am trying to do. 

The problem is holding the previous value in the shift register as change its value with each iteration. 

Please anyone can help.

Thanks

[wiebe@CARYA · Accepted solution]

Why not post a VI? Now we need to recreate it...

Why not embed the image? Now we need to download, open and delete it.

You don't need a shift register and a feedback node. The serve the same purpose.

Here's the same with a shift register on the main loop:

The top shift register could be initialized with an empty array (preventing it to work as a buffer), or with a sized array of 0s (so the case can be removed).

[altenbach]

It is impossible to troubleshoot from a truncated picture, so please attach your code and answer some questions.

• What is the purpose of the first FOR loop?
  • Why does it have two shift registers?
  • What is the size of the incoming array?
  • If it is 5k samples, why do you even need that loop?
  • What value is wired to N and how does it relate to the input sizes?
  • What output do you expect from it?
  • Almost seems like a concatenating tunnel would have about the same useless functionality.
• What is the purpose of the second FOR loop?
  • Since it does not produce any output, why is it even there?
  • Why do you initialize with an array of size 4999 if the other array is presumably 5000? One point will get dropped!
• What is outside the currently visible area?
  • Is there a top-level while loop?
  • Why don't you anchor the shift registers there!
• Have you done any basic tutorials?

[sundas]

Hi CARYA,

your solution just worked perfectly.

Thank you so much for your help.