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Counting unique values in a list

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mark

30 Jan, 2014 03:16 PM

Hi guys,

Picked up Nodebox again after a 2 year intermezzo. Been working my way through the tutorials (which is going well).
But, please, help me out with this:

How am I able to count every unique value within a list?

I have two lists. They both consist out of years (see attachment). I'm trying to connect the values of both lists through a line. It can only work when I'm able to count the unique values, I think.

Thanks in advance!
Mark

• Schermafbeelding_2014-01-30_om_16.06.34.png 142 KB

1. Support Staff 1 Posted by Frederik De Ble... on 30 Jan, 2014 04:43 PM

   

   You could try a distinct node, which filters out all double values, and
   then add a count node afterwards.

   F

   On Thu, Jan 30, 2014, at 16:18, Mark wrote:

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2. 2 Posted by mark on 30 Jan, 2014 10:53 PM

   

   Hi Frederik,

   Sorry, I guess I have to refrase myself.
   I want to count the amount of appearances of one value inside a list. The amount of appearances of every - what I called - "unique" value.

   Is it possible?

   Thanx again.
   Mark

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3. Support Staff 3 Posted by Frederik De Ble... on 04 Feb, 2014 09:33 AM

   

   The easiest way to do this is using a custom node, which I've attached here, that counts the distinct elements.

   Best,

   F

   • aggregate.zip 3.56 KB
   • Screen_Shot_2014-02-04_at_10.32.04.png 103 KB
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4. mark closed this discussion on 05 Feb, 2014 03:03 PM.