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Hi,<br>
<br>
look for "
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def combine_maps" here:<br>
<br>
<a class="moz-txt-link-freetext" href="http://cci.lbl.gov/~afonine/mssa2/run.py">http://cci.lbl.gov/~afonine/mssa2/run.py</a><br>
<br>
that does it what you want. It reads in all files with map
coefficients, averages them, and outputs averaged map coefficients.
Since Fourier transformation is a linear operation, averaging map
coefficients is equivalent to averaging actual maps.<br>
<br>
In 5 minutes I can turn this script into something like<br>
<br>
phenix.average_map_coefficients map_coeff1 map_coeff2.mtz labels="
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2FOFCWT"<br>
<br>
Do we need this tool? Tom, how much of non-isomorphism we should
allow before the above tool stops?<br>
<br>
Pavel.<br>
<br>
On 3/10/11 9:49 AM, Tom Terwilliger wrote:
<blockquote cite="mid:D8387E64-9A94-44B1-8452-903566E0F5DF@lanl.gov"
type="cite">Hi Stephen,
<div>I don't know of any phenix tools that will average two maps,
though you are right that everything is there to do it quite
easily.</div>
<div>-Tom</div>
<div><br>
<div>
<div>On Mar 10, 2011, at 10:15 AM, Stephen Graham wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">
<div>Hi there,<br>
<br>
I'd like to average 2Fo-Fc maps from 2 (approximately)
isomorphous<br>
data sets (one with ligand, one without) to see whether I
get better<br>
density for some of the noisier bits of the structure. I
don't want<br>
to do any kind of solvent flattening, histogram matching,
cyclical<br>
averaging, etc; I just want to sum the equivalent pixels
and divide by<br>
2.<br>
<br>
Is it possible to do this easily using any of the phenix
tools? It<br>
seems like all the required plumbing is there with
get_cc_mtz_mtz or<br>
superpose_maps, but I can't find a phenix utility for
averaging two<br>
superposed maps.<br>
<br>
Thanks,<br>
<br>
Stephen<br>
<br>
-- <br>
Dr Stephen Graham<br>
1851 Research Fellow<br>
Cambridge Institute for Medical Research<br>
Wellcome Trust/MRC Building<br>
Addenbrooke's Hospital, Hills Road<br>
Cambridge, CB2 0XY, UK<br>
Phone: +44 1223 762 638<br>
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<div><br>
Thomas C. Terwilliger<br>
Mail Stop M888<br>
Los Alamos National Laboratory<br>
Los Alamos, NM 87545<br>
<br>
Tel: 505-667-0072 email: <a
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