[Chimera-users] How to lower the map size

Tom Goddard goddard at sonic.net
Mon Mar 9 10:02:38 PDT 2015


Hi Zhihai,

  If you set the “step” value to 2 (above the histogram in the volume viewer dialog) then Chimera uses every other grid point along the 3 axes (8 times less data).  If you really want to produce a binned map (e.g. averaging 2x2x2 grid points to make a map half the size in each dimension), then use the Volume Filter dialog (menu Tools / Volume Data / Volume Filter) or the “vop bin” command, then save the resulting map to a new file (Volume Viewer dialog menu File / Save Map As…).

	Tom


	
> On Mar 9, 2015, at 6:45 AM, 李智海 <21620101152414 at stu.xmu.edu.cn> wrote:
> 
> Hi,
> 
> Now I have a density map with a dimension of 820*820*820, it is too large for me to perform image processes with Chimera. 
> So I was wondering whether there is a way to decrease the map size rather than re-reconstruct the map with bined particle image.
> 
> please help me out! Thank you in advance!
> 
> 
> Zhihai Li
> 
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