[Chimera-users] square of density volume
goddard at cgl.ucsf.edu
Wed Apr 14 00:11:07 PDT 2010
If you just want to average two maps with a certain weighting use the
"vop add" command with the scaleFactors argument. For example,
vop #1,2 scaleFactors 0.75,0.25
gives a 3:1 weighting of maps 1 and 2. Here is documentation:
The morphing can work too. The poor quality display is probably just
the volume viewer dialog step size being set to 2 instead of 1, so the
full resolution data is not being shown.
> Hi Tom, chimera staffs, and users,
> I have a question about the vop morph tool.
> I want to average two volumes of the electron density map at the
> different rate (for example, 1:1, 2:1, 3:1, ...).
> I found the vop morph tool which can make an intermediate volume
> between two structures.
> So, I used the vop morph tool to average two volumes. For example, to
> obtain the 1:1 averaging map of two density maps, the step size was
> set at 0.5 and I got a fraction of 0.5 as a 1:1 averaging map.
> However, the resolution of the resulting map clearly dropped and the
> map seemed to be vague.
> Does some (filtering? smoothing?) effect was included in the vop morph
> tool to decrease the resolution (because the vop morph tool should be
> made to make a smooth varying movie between two structures)?
> If so, is there some other chimera tool to simply average two (or
> more) volumes of the density map at the rate of 1:1 (or favorably 2:1,
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