[Camino-users] tractstats

[Philip A Cook]

Hi,

Thanks for the report, this is a bug, it is failing because it doesn't have a voxel to physical space transformation. It shouldn't need one since the length of each tract is already in physical space. I will work on a fix for this.

In the interim, you can work around the problem by using the FA image you mentioned:

  cat  trk.Bfloat | tractstats -header fa.nii.gz -tractstat length >  stats.Bdouble


Phil

On Apr 27, 2012, at 4:06 PM, Yan Jin wrote:

> Hi Florian,
> 
> Thank you! I just tried the command, but I got lots of "?" in the
> text. I think that there is something wrong with the binary output
> from tractstats. Are you using the current version (build 1043)?
> 
> Yan
> 
> On Fri, Apr 27, 2012 at 12:50 PM, Florian Fischer
> <flofisch at students.uni-mainz.de> wrote:
>> Hi Yan,
>> 
>> you could just pass the (binary) tractstats output to "double2txt" like so:
>> 
>> tractstats -tractstat  length<  trk.Bfloat |double2txt>  stats.txt
>> 
>> 
>> Cheers
>> 
>> Florian
>> 
>> 
>> 
>> On 04/27/2012 09:05 PM, Yan Jin wrote:
>>> 
>>> Hi,
>>> 
>>> I just used tractstats to get the length of the streamlines. It
>>> doesn't seem to work. Here is what I did:
>>> 
>>> tractstats -tractstat  length<  trk.Bfloat>  stats.Bdouble
>>> 
>>> Then in Matlab:
>>> fid=fopen('stats.Bdouble'. 'r'. 'b');
>>> data=fread(fid, 'double');
>>> 
>>> But when I view data, it shows "NaN". I tried "endpointsep" as well.
>>> It was the same. However, "min" works with an FA image. Did I do
>>> anything wrong? Could you double check? I used v1043.
>>> 
>>> Thanks,
>>> Yan
>>> _______________________________________________
>>> Camino-users mailing list
>>> Camino-users at www.nitrc.org
>>> http://www.nitrc.org/mailman/listinfo/camino-users
>> 
>> 
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