Consecutive numbers in list

Hello everyone!

i'm struggling with this:

i have a list of values in branches of different sizes (picture attached), sometimes 6 values in one branch, sometimes 3, etc.

I'm looking for the value that is repeated 3 times in a row (easy thing where it's just three of them, but they are always mixed with other branches of different sizes), so for instance the value in bold in the picture.

ps. the values correspond to a X coordinate of points, i need to extract all the points with the same X coordinate. Points are in a 3x3 grid, and not all the cells are "full" (attachement 2)

Thanks!

Attachments:

Numbers.PNG, 10 KB
Grid.PNG, 26 KB

Replies to This Discussion

Permalink Reply by ng5 Alex on March 31, 2015 at 9:16am

Hello Lorenzo

gave it a go native grasshopper components only

cheers

alex

*edit same as nikos solution

Permalink Reply by Raul Matagringo on March 31, 2015 at 9:23am

or if you want to keep the count of items/branch and have "null" the other items...

Attachments:

Null_2.gh, 12 KB

Permalink Reply by Lorenzo Franceschini on April 1, 2015 at 4:39am

Guys thanks everyone for the support!

somehow, when I equalize values, it messes up with true/false.

In attachment you can see an example (branch 25). 940.5 is in position 0, 1 and 4. Somehow, the bool outcome is messed up (position 1 gives false when it should be true).

any ideas?

thanks

Attachments:

Problem.PNG, 96 KB

Permalink Reply by nikos tzar on April 1, 2015 at 5:35am

That might be what David pointed out in his first reply.

And this is probably why Raul has been working with indices instead of float numbers.

Your definition has two more problems though:

1. You shouldn't use 0 in the expression because if you have a set of 3 points with x=0 it will mess up.

2. If you have 2 sets of points with equal x in the same list, it will not work.

And finally it appears from your screenshot that you are not after the actual number that repeats 3 times but rather a true-false pattern to help you evaluate another list.

So something like this should work:

just notice that you actually want the [Num] component to give an error because this way it turns empty items to nulls.

also notice that the pattern provided by [Null] component is the opposite from the one you want, so you should use the B output.

Attachments:

sorting-2.gh, 11 KB

Permalink Reply by Lorenzo Franceschini on April 1, 2015 at 6:10am

Yes, it all appears to work but this, and it's driving me crazy:

Permalink Reply by nikos tzar on April 1, 2015 at 6:17am

I already told you, this is probably what David pointed out in his post.

Check these posts out as well:

http://www.grasshopper3d.com/page/search-results?cx=007664031582976...

Permalink Reply by Raul Matagringo on April 1, 2015 at 7:50am

as nikos told you, it is dangerous to assign "0". However i can't understand what is wrong with this solution. Here you have one with true/false at the end: