[chimerax-users] Re: Range selection dose not work.

Hello Ran, As suggested by what is shown in your Log when you use "info sel" (which I can partially see in the screenshot) you need to use @@ to indicate an attribute, as well as the attribute name, in this case serial_number. I think you want something like this, to select serial numbers 1-3: select @@serial_number>0 & @@serial_number<4 See the help on specifying atoms by attribute value: https://rbvi.ucsf.edu/chimerax/docs/user/commands/atomspec.html#attributes You don't need to give model number because there is only one model. I believe that Guillame's suggestion is not right because using a single @ means the name of the atom, not the serial number. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Resource for Biocomputing, Visualization, and Informatics Department of Pharmaceutical Chemistry University of California, San Francisco

On Apr 2, 2024, at 8:34 AM, Guillaume Gaullier via ChimeraX-users wrote:

Hello Ran, In your screenshot, the @ symbol is missing in the commands. The atom specification #1:1-2 in the screenshot means "model 1, residues 1-2", but this molecule has no residues because it is not a polymer. This is why the resulting selection is empty.

I suspect the command you mention in your email wouldn’t work either, because it has both : and @ (or maybe the : selector would just be ignored since you provide no residue name or number, and since doing so results in an empty selection but no error based on your screenshot). Try this instead: sel #1@1-2 (you might have to adjust the atom numbers to select the ones you want). I hope this helps, Guillaume

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On 2 Apr 2024, at 16:46, 洪冉 via ChimeraX-users wrote:

Dear Users and Developers of ChimeraX, I am attempting to make a selection of a range of atoms by their numbers in ChimeraX. However, the command I have used does not seem to work in my case. The command in question is sel #1:@1-3.

Could anyone assist me with this issue? For screenshots, please see below. Many thanks in advance! Ran