I am new to Houdini and have the following question:
- I made a box and set Axis divisions to (20,20,4)
- I created a node “attribcreate” (my_attr), specified class “Points” and set values ($BBX,$BBY).
Attribute ‘my_attr’ now has bounding box coordinates for each point in range
- I need to group points for which the following is true: (@my_attr.x == 0 OR @my_attr.x == 1) AND (@my_attr.y == 0 OR @my_attr.y == 1)
This should select all point for 4 outer edges of my box.

- Which node should I use (group, group expression)?
- How do I write correctly the condition above?

As I understood sign “@” is used to access attributes, but expression above just doesn't work.

use Group Expression
just replace AND with &&
and OR with ||

here is the VEX syntax reference
https://www.sidefx.com/docs/houdini/vex/lang.html#comparisons [www.sidefx.com]