Sorting Points by x- and y- values

I'm looking for a way to sort a list points, built up from series of x and y values, by the y-values first and then, by x-values:

Current List: Output from Point XYZ Component

(0.0, 0.0, 0.0)

(1.0, 0.0, 0.0)

(2.0, 0.0, 0.0)

(3.0, 0.0, 0.0)

(0.0, 1.0, 0.0)

(1.0, 1.0, 0.0)

(2.0, 1.0, 0.0)

(3.0, 1.0, 0.0)

(0.0, 2.0, 0.0)

(1.0, 2.0, 0.0)

(2.0, 2.0, 0.0)

(3.0, 2.0, 0.0)

Desired List:

(0.0, 0.0, 0.0)

(0.0, 1.0, 0.0)

(0.0, 2.0, 0.0)

(0.0, 3.0, 0.0)

(1.0, 0.0, 0.0)

(1.0, 1.0, 0.0)

(1.0, 2.0, 0.0)

(1.0, 3.0, 0.0)

(2.0, 0.0, 0.0)

(2.0, 1.0, 0.0)

(2.0, 2.0, 0.0)

(2.0, 3.0, 0.0)

I was unable to make the Sort List Component work successfully:

Thanks,

Amanda

Replies to This Discussion

Permalink Reply by David Rutten on June 7, 2010 at 2:24pm

Hi Amanda,

Sort only works on numbers. One number can be smaller or larger than another, but one point cannot really be smaller or larger than another point.

What you need to do is convert your points into numbers. Since you want to sort first by x, then by y (if x is identical), then by z (if x and y are identical), you need to somehow munge these three coordinates into a single number.

Now, if you can be certain that the coordinates are not excessively large or small numbers, then you can do something like the following:

sortkey = 10,000 * x + 100 * y + z

Then you Sort the list of sortkeys while synchronously sorting your original pointlist:

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Nader Belal on December 11, 2015 at 6:03pm

David,

Thank you

Permalink Reply by Dingkun Wang on June 30, 2016 at 1:14pm

This is great! Thank you!

Permalink Reply by Armano Papageorge on October 22, 2017 at 4:19pm

Could you please repost the image? I'm able to see a portion of it?

Where the sort component sorts in the xyz.

I need to be able to sort in the yxz.

Thanks

Permalink Reply by Lei Yang on July 12, 2018 at 10:07pm

Hi David,

All different with what I wanna do.
pls check below:

listPts = rs.coercePoints3d(input)
#is it possible use sorted() function like:
sorted(listPts, key = listPts.x)
#the syntax is bad but for address the idea that: I want use sort() or sorted() function to sort a point3d list by its x or y value.

Permalink Reply by Amanda M. Schluter on June 7, 2010 at 2:36pm