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On Tue, Apr 25, 2006 at 09:45:31AM +0100, Charlie Bond wrote: > *** For details on how to be removed from this list visit the *** > *** CCP4 home page http://www.ccp4.ac.uk *** > > > Jin K. Yang wrote: > > So, I want to generate a new map whose 1-sigma level density is actually > > the 4-sigma level density of the original one, and to get the structure > > factor from the new map and to try MR. > > But, I cannot find a way to manipulate the map in this way. Is there > > anybody who knows how to do it? > > Does this sound reasonable ? > > Unless I misunderstand you, I don't think this is possible. 1 sigma will > always be 1 sigma. > > It reminds me of the story of a politician who remarked how disgusting > it was that 50% of children were below average. > > Cheers, > Charlie > Dear Charlie, This politician didn't know the difference between the average (mean) and the median. There could be (much) more or (much) less that 50% of the children below average, depending on the skewness of the distribution. However, there will always be 50% below the median. But maybe this is too complicated for politicians. With best wishes, Gerard. -- =============================================================== * * * Gerard Bricogne [EMAIL PROTECTED] * * * * Global Phasing Ltd. * * Sheraton House, Castle Park Tel: +44-(0)1223-353033 * * Cambridge CB3 0AX, UK Fax: +44-(0)1223-366889 * * * ===============================================================
