Branch item count

Replies to This Discussion

Permalink Reply by David Rutten on March 20, 2013 at 10:24am

You don't need flatten at all. Just use List Length on the entire tree and you'll get lengths for each branch in the tree.

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Johann Magnus Kjartansson on March 20, 2013 at 11:12am

Sorry, I forgot to mention that in each of the 10 brances, area sub-branches as the data is originally collected from polylines, so a sub-branch for each polyline. I'm using "Control Points" to collect the points from the polylines.

This is my resault from using list length on entire tree.

Branch 0

Polyline 1 {0;1}  ->  Point count

Polyline 2 {0;2}  -> Point count

...

Branch 1

Polyline 1 {1;1}  ->  Point count

Polyline 2 {1;2}  -> Point count

...

This is the resault I want

Branch 0

{0}  ->  Total Point count of all branches in {0}

Branch 1

{1}  ->  Total Point count of all branches in {1}

So in theory what I want to do is "Flatten Tree" but on each of the initial 10 branches. Or retrieve the sum of all items in each branch to say it differently.

Permalink Reply by Jesus Galvez on March 20, 2013 at 1:49pm

You'll have to use the [Path Mapper] component. 

{A;B;C}           ->          {B}

should do the trick. 

Permalink Reply by Johann Magnus Kjartansson on March 20, 2013 at 5:44pm

Ahh, thank you. My tree was only at a second level of branching {A;B} so this did the trick.

{A;B}     ->     {A}

As I understand it correctly, it takes all the B branches in each list and flattens them onto a single branch at level A.