Hi Bruce and Amy,
I think that menu command actually outputs a binary file, which I would give a
.dip extension. Some matlab code for reading one is included below.
Don
function dipole_info=ts_read_dip_file(dip_file)
% ts_read_dip_file.m: read dipole file for calculating forward solution
%
% dipole_info=ts_read_dip_file(dip_file)
%
% read freesurfer dip file for the location and orientation of the dipoles
% returns dipole_info containing x,y,z location and nx,ny,nz normal vector
%
% created: 05/07/05 by Mingxiong Huang as read_dipdec.m
% early mod: 11/27/05 by Don Hagler as read_dip_file.m
% last mod: 08/01/06 by Don Hagler
%
dipole_info = [];
% make sure file exists
[status,message,messageid]=fileattrib(dip_file);
if (status==0)
fprintf('%s: file %s not found... quitting\n',mfilename,dip_file);
return;
end
% read dip file to get the location of the dipole
fprintf('ts_read_dip_file: reading file %s...\n',dip_file);
fp=fopen(dip_file,'r','ieee-be.l64');
[ch]=fread(fp,1,'uchar');
[n_dipole]=fread(fp,1,'int32');
dipole_info=fread(fp,[6,n_dipole],'float');
fclose(fp);
fprintf('%s: %d dipoles\n',mfilename,n_dipole);
> Date: Wed, 25 Jan 2012 17:35:22 -0500
> From: fis...@nmr.mgh.harvard.edu
> To: aguth...@lanl.gov
> CC: freesurfer@nmr.mgh.harvard.edu
> Subject: Re: [Freesurfer] write dipoles function
>
> Hi Amy
>
> hmmm, no one has used that for ages that I know of! Looks like it is an
> ascii file with:
>
> #!ascii
> number of vertices
> x y z nx ny nz
> .
> .
> .
> vnum nbr_0 nbr_1 ... nbr_(vnum-1)
> .
> .
> .
>
>
> where ... means it is repeated for # of vertices, <x y z> are the vertex
> coords and <nx ny nz> is the surface normal
>
> On Wed, 25 Jan 2012,
> Guthormsen, Amy M wrote:
>
> > Hello,
> >
> > I would like to try out the Tools-->surface-->write dipoles function, but I
> > don't know how to read the file that it outputs. Do I need to use a
> > special file extension when I name the file?
> >
> > Thank you,
> >
> > Amy
> > _______________________________________________
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> >
> >
> >
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