Hi Yangqi, You could place markers on opposite sides of the density contour surface, then measure the distance between the markers. For marker creation/placement, see Volume Tracer (in menu under Tools… Volume Data): <http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/volumepathtracer/f...> For distance measurement, markers are treated the same as atoms. One way to do the measurement is to Ctrl-click on one marker to select it, then Shift-Ctrl-doubleclick on the other one to also select it and show context menu with a choice to measure the distance. <http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/structuremeas/stru...> 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 17, 2018, at 6:53 PM, BuddySphinx <yangqi.gu@yale.edu> wrote:
Dear Chimera users, I am trying to measure the diameter of my filament based on the EM volume. I am wondering which function I can use to measure the cross-section of it? Best, Yangqi