[Chimera-users] reading complex-float mrc files

Tom Goddard goddard at cgl.ucsf.edu
Fri Apr 10 11:21:30 PDT 2009

Hi Benoit,

  Chimera cannot read volume data with complex values.  It would be 
nice, but it would require special case handling in a lot of Chimera 
code: histogram display, contour levels, coloring by value, all could 
use the magnitude of the complex data values.  But that could all be 
done by starting with a different volume data set that holds the 
magnitudes of the complex values.   As you point out using the complex 
values could have use with Fourier analysis and there might even be 
specific visualization methods like looking at the complex phase.  I'll 
put this on our feature request list but I think it is unlikely to ever 
be done given the many more widely useful enhancements already requested.


Benoit Zuber wrote:
> Hi,
> I was wondering if it is possible to read mrc files where the data type 
> is complex float. I get an error when I try to do that, but maybe there 
> is a way around it (other than converting the data to a non complex type).
> Typically, this would be useful to read fourier transform volumes.
> Thanks,
> Ben

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