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Opened 2 months ago
Closed 2 months ago
#18416 closed defect (fixed)
Volume sdLevel is not from mean but from from zero
| Reported by: | Owned by: | Tom Goddard | |
|---|---|---|---|
| Priority: | normal | Milestone: | |
| Component: | Volume Data | Version: | |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Notify when closed: | Platform: | all | |
| Project: | ChimeraX |
Description
The following bug report has been submitted:
Platform: Linux-6.8.0-71-generic-x86_64-with-glibc2.39
ChimeraX Version: 1.10.1 (2025-07-24 20:15:27 UTC)
Description
Volume sdLevel is not from mean but from from zero
Hello,
ChimeraX user guide describes command 'volume sdlevel' as setting volume level at standard deviation (SD) from the mean. In my experinece I get values apparently calculated as SD from zero. If you could give me any workaround except calculating the level value based on 'Measure mapstat' values? If it is a bug, fixing it in following versions ChimeraX is appreciated.
Kind regards,
Sergei
OpenGL version: 3.3.0 NVIDIA 470.256.02
OpenGL renderer: Quadro P4000/PCIe/SSE2
OpenGL vendor: NVIDIA Corporation
Python: 3.11.4
Locale: en_US.UTF-8
Qt version: PyQt6 6.8.1, Qt 6.8.2
Qt runtime version: 6.8.2
Qt platform: xcb
XDG_SESSION_TYPE=x11
DESKTOP_SESSION=mate
XDG_SESSION_DESKTOP=mate
XDG_CURRENT_DESKTOP=MATE
DISPLAY=:0
Manufacturer: LENOVO
Model: 30BES0K300
OS: Linux Mint 22.1
Architecture: 64bit ELF
Virtual Machine: none
CPU: 16 Intel(R) Xeon(R) W-2145 CPU @ 3.70GHz
Cache Size: 11264 KB
Memory:
total used free shared buff/cache available
Mem: 62Gi 18Gi 27Gi 274Mi 17Gi 43Gi
Swap: 2.0Gi 3.5Mi 2.0Gi
Graphics:
65:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP104GL [Quadro P4000] [10de:1bb1] (rev a1)
Subsystem: NVIDIA Corporation GP104GL [Quadro P4000] [10de:11a3]
Kernel driver in use: nvidia
Installed Packages:
alabaster: 1.0.0
appdirs: 1.4.4
asttokens: 3.0.0
babel: 2.17.0
beautifulsoup4: 4.13.3
blockdiag: 3.0.0
blosc2: 3.6.1
build: 1.2.2.post1
certifi: 2025.7.14
cftime: 1.6.4.post1
charset-normalizer: 3.4.2
ChimeraX-AddCharge: 1.5.19
ChimeraX-AddH: 2.2.7
ChimeraX-AlignmentAlgorithms: 2.0.2
ChimeraX-AlignmentHdrs: 3.6.1
ChimeraX-AlignmentMatrices: 2.1
ChimeraX-Alignments: 2.20.2
ChimeraX-AlphaFold: 1.0.1
ChimeraX-AltlocExplorer: 1.1.2
ChimeraX-AmberInfo: 1.0
ChimeraX-Aniso: 1.1.4
ChimeraX-Arrays: 1.1
ChimeraX-Atomic: 1.60.7
ChimeraX-AtomicLibrary: 14.1.19
ChimeraX-AtomSearch: 2.0.1
ChimeraX-AxesPlanes: 2.4
ChimeraX-BasicActions: 1.1.3
ChimeraX-BILD: 1.0
ChimeraX-BlastProtein: 3.0.0
ChimeraX-Boltz: 1.0
ChimeraX-BondRot: 2.0.4
ChimeraX-BugReporter: 1.0.2
ChimeraX-BuildStructure: 2.13.1
ChimeraX-Bumps: 1.0
ChimeraX-BundleBuilder: 1.5.1
ChimeraX-ButtonPanel: 1.0.1
ChimeraX-CageBuilder: 1.0.1
ChimeraX-CellPack: 1.0
ChimeraX-Centroids: 1.4
ChimeraX-ChangeChains: 1.1
ChimeraX-CheckWaters: 1.5
ChimeraX-ChemGroup: 2.0.2
ChimeraX-Clashes: 2.3
ChimeraX-Clipper: 0.25.0
ChimeraX-ColorActions: 1.0.5
ChimeraX-ColorGlobe: 1.0
ChimeraX-ColorKey: 1.5.8
ChimeraX-CommandLine: 1.3
ChimeraX-ConnectStructure: 2.0.1
ChimeraX-Contacts: 1.0.1
ChimeraX-Core: 1.10.1
ChimeraX-CoreFormats: 1.2
ChimeraX-coulombic: 1.4.5
ChimeraX-Crosslinks: 1.0
ChimeraX-Crystal: 1.0
ChimeraX-CrystalContacts: 1.0.1
ChimeraX-DataFormats: 1.2.4
ChimeraX-Dicom: 1.2.7
ChimeraX-DistMonitor: 1.4.2
ChimeraX-DockPrep: 1.1.4
ChimeraX-Dssp: 2.0
ChimeraX-EMDB-SFF: 1.0
ChimeraX-ESMFold: 1.0
ChimeraX-FileHistory: 1.0.1
ChimeraX-FunctionKey: 1.0.1
ChimeraX-Geometry: 1.3
ChimeraX-gltf: 1.0
ChimeraX-Graphics: 1.4.1
ChimeraX-Hbonds: 2.5.1
ChimeraX-Help: 1.3
ChimeraX-HKCage: 1.3
ChimeraX-IHM: 1.1
ChimeraX-ImageFormats: 1.2
ChimeraX-IMOD: 1.0
ChimeraX-IO: 1.0.3
ChimeraX-ISOLDE: 1.10.0
ChimeraX-ItemsInspection: 1.0.1
ChimeraX-IUPAC: 1.0
ChimeraX-KVFinder: 1.6.2
ChimeraX-Label: 1.1.14
ChimeraX-LinuxSupport: 1.0.1
ChimeraX-ListInfo: 1.2.2
ChimeraX-Log: 1.2
ChimeraX-LookingGlass: 1.1
ChimeraX-Maestro: 1.9.1
ChimeraX-Map: 1.3
ChimeraX-MapData: 2.0
ChimeraX-MapEraser: 1.0.1
ChimeraX-MapFilter: 2.0.1
ChimeraX-MapFit: 2.0
ChimeraX-MapSeries: 2.1.1
ChimeraX-Markers: 1.0.1
ChimeraX-Mask: 1.0.2
ChimeraX-MatchMaker: 2.2.2
ChimeraX-MCopy: 1.0
ChimeraX-MDcrds: 2.10.1
ChimeraX-MedicalToolbar: 1.1
ChimeraX-Meeting: 1.0.1
ChimeraX-MLP: 1.1.1
ChimeraX-mmCIF: 2.16
ChimeraX-MMTF: 2.2
ChimeraX-ModelArchive: 1.0
ChimeraX-Modeller: 1.5.19
ChimeraX-ModelPanel: 1.5.1
ChimeraX-ModelSeries: 1.0.1
ChimeraX-Mol2: 2.0.3
ChimeraX-Mole: 1.0
ChimeraX-Morph: 1.0.2
ChimeraX-MouseModes: 1.2
ChimeraX-Movie: 1.0
ChimeraX-MutationScores: 1.0
ChimeraX-Neuron: 1.0
ChimeraX-Nifti: 1.2
ChimeraX-NMRSTAR: 1.0.2
ChimeraX-NRRD: 1.2
ChimeraX-Nucleotides: 2.0.3
ChimeraX-OpenCommand: 1.14.1
ChimeraX-OrthoPick: 1.0.1
ChimeraX-PDB: 2.7.10
ChimeraX-PDBBio: 1.0.1
ChimeraX-PDBLibrary: 1.0.4
ChimeraX-PDBMatrices: 1.0
ChimeraX-PickBlobs: 1.0.1
ChimeraX-Positions: 1.0
ChimeraX-PresetMgr: 1.1.3
ChimeraX-ProfileGrids: 1.1.3
ChimeraX-PubChem: 2.2
ChimeraX-ReadPbonds: 1.0.1
ChimeraX-Registration: 1.1.2
ChimeraX-RemoteControl: 1.0
ChimeraX-RenderByAttr: 1.6.3
ChimeraX-RenumberResidues: 1.1
ChimeraX-ResidueFit: 1.0.1
ChimeraX-RestServer: 1.3.1
ChimeraX-RNALayout: 1.0
ChimeraX-RotamerLibMgr: 4.0
ChimeraX-RotamerLibsDunbrack: 2.0
ChimeraX-RotamerLibsDynameomics: 2.0
ChimeraX-RotamerLibsRichardson: 2.0
ChimeraX-SaveCommand: 1.5.1
ChimeraX-SchemeMgr: 1.0
ChimeraX-SDF: 2.0.3
ChimeraX-Segger: 1.0
ChimeraX-Segment: 1.0.1
ChimeraX-Segmentations: 3.5.7
ChimeraX-SelInspector: 1.0
ChimeraX-SeqView: 2.17.1
ChimeraX-Shape: 1.1
ChimeraX-Shell: 1.0.1
ChimeraX-Shortcuts: 1.2.1
ChimeraX-ShowSequences: 1.0.3
ChimeraX-SideView: 1.0.1
ChimeraX-SimilarStructures: 1.0.1
ChimeraX-Smiles: 2.1.2
ChimeraX-SmoothLines: 1.0
ChimeraX-SpaceNavigator: 1.0
ChimeraX-StdCommands: 1.19.1
ChimeraX-STL: 1.0.1
ChimeraX-Storm: 1.0
ChimeraX-StructMeasure: 1.2.1
ChimeraX-Struts: 1.0.1
ChimeraX-Surface: 1.0.1
ChimeraX-SwapAA: 2.0.1
ChimeraX-SwapRes: 2.5.2
ChimeraX-TapeMeasure: 1.0
ChimeraX-TaskManager: 1.0
ChimeraX-Test: 1.0
ChimeraX-Toolbar: 1.2.3
ChimeraX-ToolshedUtils: 1.2.4
ChimeraX-Topography: 1.0
ChimeraX-ToQuest: 1.0
ChimeraX-Tug: 1.0.1
ChimeraX-UI: 1.45.2
ChimeraX-Umap: 1.0
ChimeraX-uniprot: 2.3.1
ChimeraX-UnitCell: 1.0.1
ChimeraX-ViewDockX: 1.4.4
ChimeraX-VIPERdb: 1.0
ChimeraX-Vive: 1.1
ChimeraX-VolumeMenu: 1.0.1
ChimeraX-vrml: 1.0
ChimeraX-VTK: 1.0
ChimeraX-WavefrontOBJ: 1.0
ChimeraX-WebCam: 1.0.2
ChimeraX-WebServices: 1.1.5
ChimeraX-Zone: 1.0.1
colorama: 0.4.6
comm: 0.2.2
contourpy: 1.3.2
coverage: 7.10.0
cxservices: 1.2.3
cycler: 0.12.1
Cython: 3.0.12
debugpy: 1.8.15
decorator: 5.2.1
distro: 1.9.0
docutils: 0.21.2
executing: 2.2.0
filelock: 3.18.0
fonttools: 4.59.0
funcparserlib: 2.0.0a0
glfw: 2.9.0
grako: 3.16.5
h5py: 3.14.0
html2text: 2024.2.26
idna: 3.10
ihm: 2.2
imagecodecs: 2024.6.1
imagesize: 1.4.1
iniconfig: 2.1.0
ipykernel: 6.29.5
ipython: 8.26.0
ipywidgets: 8.1.7
jedi: 0.19.1
Jinja2: 3.1.6
joblib: 1.4.2
jupyter_client: 8.6.3
jupyter_core: 5.8.1
jupyterlab_widgets: 3.0.15
kiwisolver: 1.4.8
line_profiler: 4.2.0
llvmlite: 0.44.0
lxml: 5.3.1
lz4: 4.3.2
MarkupSafe: 3.0.2
matplotlib: 3.10.1
matplotlib-inline: 0.1.7
msgpack: 1.1.0
ndindex: 1.10.0
nest-asyncio: 1.6.0
netCDF4: 1.6.5
networkx: 3.3
nibabel: 5.2.0
nptyping: 2.5.0
numba: 0.61.2
numexpr: 2.11.0
numpy: 1.26.4
nvidia-nvjitlink-cu12: 12.9.86
OpenMM: 8.2.0
OpenMM-CUDA-12: 8.2.0
openvr: 1.26.701
packaging: 24.2
ParmEd: 4.2.2
parso: 0.8.4
pep517: 0.13.1
pexpect: 4.9.0
pickleshare: 0.7.5
pillow: 10.4.0
pip: 25.0.1
pkginfo: 1.11.1
platformdirs: 4.3.8
pluggy: 1.6.0
prompt_toolkit: 3.0.51
psutil: 7.0.0
ptyprocess: 0.7.0
pure_eval: 0.2.3
py-cpuinfo: 9.0.0
pycollada: 0.8
pydicom: 2.4.4
Pygments: 2.18.0
pynmrstar: 3.3.5
pynndescent: 0.5.13
pynrrd: 1.0.0
PyOpenGL: 3.1.9
PyOpenGL-accelerate: 3.1.9
pyopenxr: 1.1.4501
pyparsing: 3.2.3
pyproject_hooks: 1.2.0
PyQt6: 6.8.1
PyQt6-Qt6: 6.8.2
PyQt6-WebEngine: 6.8.0
PyQt6-WebEngine-Qt6: 6.8.2
PyQt6_sip: 13.10.0
pytest: 8.4.1
pytest-cov: 6.2.1
python-dateutil: 2.9.0.post0
pytz: 2025.2
pyzmq: 27.0.0
qtconsole: 5.5.2
QtPy: 2.4.3
qtshim: 1.1
RandomWords: 0.4.0
requests: 2.32.3
roman-numerals-py: 3.1.0
scikit-learn: 1.6.1
scipy: 1.14.0
setuptools: 78.1.0
sfftk-rw: 0.8.1
six: 1.16.0
snowballstemmer: 3.0.1
sortedcontainers: 2.4.0
soupsieve: 2.7
Sphinx: 8.2.3
sphinx-autodoc-typehints: 3.1.0
sphinxcontrib-applehelp: 2.0.0
sphinxcontrib-blockdiag: 3.0.0
sphinxcontrib-devhelp: 2.0.0
sphinxcontrib-htmlhelp: 2.1.0
sphinxcontrib-jsmath: 1.0.1
sphinxcontrib-qthelp: 2.0.0
sphinxcontrib-serializinghtml: 2.0.0
stack-data: 0.6.3
superqt: 0.7.1
tables: 3.10.2
tcia_utils: 1.5.1
threadpoolctl: 3.6.0
tifffile: 2025.3.13
tinyarray: 1.2.4
tornado: 6.5.1
tqdm: 4.67.1
traitlets: 5.14.3
typing_extensions: 4.14.1
tzdata: 2025.2
umap-learn: 0.5.7
urllib3: 2.5.0
wcwidth: 0.2.13
webcolors: 24.11.1
wheel: 0.45.1
wheel-filename: 1.4.2
widgetsnbextension: 4.0.14
Change History (2)
comment:1 by , 2 months ago
| Component: | Unassigned → Volume Data |
|---|---|
| Owner: | set to |
| Platform: | → all |
| Project: | → ChimeraX |
| Status: | new → assigned |
| Summary: | ChimeraX bug report submission → Volume sdLevel is not from mean but from from zero |
comment:2 by , 2 months ago
| Resolution: | → fixed |
|---|---|
| Status: | assigned → closed |
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Wow, that is embarrassing. That wrong sdLevel calculation has been in ChimeraX for 9 years and no one noticed. I have fixed it in the ChimeraX daily build dated August 13, 2025 or newer. Thanks for reporting the problem.
You can get the correct threshold using the "measure mapstats" command by setting the volume level to the <mean> + <number-sd> * <sd>. So for example to set the threshold to 3 standard deviations above the mean (0.08133 + 3 * 0.3245 = 1.05483)