August 2021 - ChimeraX-users - RBVI Mailing Lists

Re: [chimerax-users] Saving 300dpi high resolution images with ChimeraX
by Elaine Meng 04 Aug '21

04 Aug '21

Hi Nada, ChimeraX questions should be sent to chimerax-users(a)cgl.ucsf.edu (CC'd here so you don't need to do anything this time). ChimeraX does not set the dpi. You just figure out the number of pixels you need and then save in pixels. I.e. if you want 3 inches wide at 600 dpi then you know you need 1800 pixel width, e.g. save myfile.png width 1800 If you open the resulting image file in just about any general image application like Photoshop, Gimp, or Mac Preview (etc.) then you can set the "resolution" or "dpi", but it's really the number of pixels you save in the first place that matters. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco > On Aug 4, 2021, at 10:04 AM, Bejar, Nada <nbejar(a)houstonmethodist.org> wrote: > > Hello, > I am Nada, a postdoctoral fellow at Houston Methodist. > > I saw your name in this thread. https://www.rbvi.ucsf.edu/pipermail/chimerax-users/2020-January/000816.html > I tried your suggestion, but any number I put on width would still give me a 96dpi. > > I switched to the old Chimera and I can change the unit to print unit and that resolves the issues, but I have all my work done on ChimeraX. > > I do need to make figures today and help would be much much appreciated. > > Nada Bejar, Ph. D. > Postdoctoral Fellow > Kiss RNA Lab > Houston Methodist Research Institute > 6670 Bertner Avenue > Houston, TX 77030 USA

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Re: [chimerax-users] Error in ChimeraX application installation linux ubuntu
by Elaine Meng 04 Aug '21

04 Aug '21

Hi Vanessa, Please send ChimeraX questions to chimerax-users(a)cgl.ucsf.edu (CC'd here, so no need to do anything this time). Since I don't know the answer, I kept waiting for somebody else to answer your question... and didn't notice until now that you had sent it to only me. Thanks, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco > On Aug 1, 2021, at 1:51 AM, Vanessa Roy <vanessaroy(a)mail.tau.ac.il> wrote: > > Dear ChimeraX development team, > > We encountered issues while installing ChimeraX on our server and wanted to ask whether you could help us understand what the problem is? We haven't yet found a solution to our problem. > Here is the output after installation: > > # /home/apps/chimerax-1.2.5-rc-2021.05.24/bin/ChimeraX > X11 connection rejected because of wrong authentication. > qt.qpa.xcb: could not connect to display localhost:10.0 > qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found. > This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. > > Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb. > > Fatal Python error: Aborted > > Current thread 0x00007f479c05d740 (most recent call first): > File "/home/apps/chimerax-1.1/lib/python3.7/site-packages/chimerax/ui/gui.py", line 119 in __init__ > File "/home/apps/chimerax-1.1/lib/python3.7/site-packages/ChimeraX_main.py", line 500 in init > File "/home/apps/chimerax-1.1/lib/python3.7/site-packages/ChimeraX_main.py", line 919 in <module> > File "/home/apps/chimerax-1.1/lib/python3.7/runpy.py", line 85 in _run_code > File "/home/apps/chimerax-1.1/lib/python3.7/runpy.py", line 193 in _run_module_as_main > Aborted (core dumped) > > We would greatly appreciate your advice on how to solve this issue. > > Many thanks for your help! > > Best, > Vanessa > -- > Vanessa Roy > Gil Ast Lab > Department of Human Molecular Genetics and Biochemistry > Sackler Faculty of Medicine | Tel Aviv University

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Maps comparison
by Dmitry Semchonok 04 Aug '21

04 Aug '21

Dear colleagues, I have 2 cryo-em maps of different resolutions. What will be the correct strategy to compare them and what are the tools and steps? Thank you Sincerely, Dmitry

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C-alphas rendered as dots
by Pranav Shah 03 Aug '21

03 Aug '21

Hi Team, I am working with a huge model (and a correspondingly huge map), which makes the handling on my GPU accelerated desktop an agonisingly frustrating experience. In order to speed up simple (rigid-body) fitting of the map and model, I decided to use the -C-alpha trace of the pdb. However, the pdb gets rendered as a bunch of disconnected dots whereas the same pdb in Chimera is rendered correctly with all things. Is this a normal behaviour for ChimeraX? I could use Chimera, but I prefer the way ChiemraX handles large maps as compared to Chimera. In the absence of a quick fix, would there be a way to increase the size of the atoms? Best, Pranav -- Pranav Shah Postdoctoral Research Fellow. Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, UK

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