[3dem] Remove negative density from a map

[Daniel Castano Diez]

Hi Max,

these kind of manipulations (pixelwise operations on volumes) are easy 
in Matlab  (or in the  Dynamo command line if you don't have a Matlab 
license), for instance in your case:

 >> dread mymap.mrc a;  % reads your map into the Matlab/Dynamo workspace
 >> a(a<0)=0;          % now it's just an array that you can manipulate 
from the command line and then write again into a .mrc file

cheers,
D.

> Dear all
> Does anybody know how to remove negative density (set to zero) from a mrc map?
> I subtracted two structures to highlight a factor and the negative peaks are making my life miserable.
> Best
> Max
>
> __________________________________
> Massimiliano Maletta
> post-doc in
> NKI Netherlands Cancer Institute -Antoni van Leeuwenhoek Hospital Plesmanlaan 121 B6 1066CX Amsterdam
> group of Peter Peters
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