If you’re a molecular modeler working extensively with SAMSON, you know how important precision and efficiency are. Navigating through complex models requires effective filtering and selecting capabilities. The Path attributes in SAMSON’s Node Specification Language (NSL) provide powerful tools to streamline such tasks. Let’s explore how these attributes can help you focus on exactly what you need, saving time and reducing errors in molecular exploration.
What Are Path Attributes?
Path attributes belong to the path attribute space (with the shorthand p) and are specifically designed to match conformation nodes. These attributes enable you to programmatically select, filter, and analyze paths by various properties, such as their name, selection state, selection flags, or the number of atoms they encompass.
Inherited Attributes
The path attribute space inherits several useful attributes from the general node attribute space, which are:
- name (
n): This matches paths based on their names. You can use strings or wildcards to define search patterns. For example: p.n "A": Matches paths named “A”.p.n "L*": Matches paths with names starting with “L”.- selected: This matches paths based on their selection state, but it doesn’t have a shorthand. Examples:
p.selected: Matches selected paths.not p.selected: Matches unselected paths.- selectionFlag (
sf): This matches paths by their selection flag. Examples include: p.sf false: Matches paths without the selection flag set.p.sf: Matches all paths with the selection flag turned on.
Specific Path Attributes
Aside from inherited attributes, the path attribute space introduces its own specific identifiers. A particularly useful one is:
- numberOfAtoms (
nat): This matches paths based on the number of atoms they contain. Whether you’re interested in broad ranges or specific thresholds, this attribute is highly effective for filtering. Examples: p.nat > 100: Matches paths with more than 100 atoms.p.nat 100:200: Matches paths with atom counts between 100 and 200.
Key Example for Practical Use
Imagine you’re working on a complex molecular system with thousands of paths. If you need to isolate all paths containing more than 100 atoms, you can simply use:
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p.nat > 100 |
For more refined filtering, perhaps you only want paths with 100 to 200 atoms and with specific names that start with “L”. Combine the attributes like this:
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p.n "L*" and p.nat 100:200 |
This capability not only cuts down on manual sifting but enables precise control when navigating complex molecular systems.
Leverage These Tools for Your Research
Understanding and applying path attributes allows molecular modelers to focus more on analysis and design rather than tedious data selection or filtering. SAMSON’s NSL continues to be a game-changer for researchers looking to streamline workflows and improve modeling accuracy.
For more detailed information about path attributes, visit the original documentation page: https://documentation.samson-connect.net/users/latest/nsl/path/.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can get SAMSON at https://www.samson-connect.net.