[VoxBo] vbview bug report

[Charan Ranganath, Ph.D.]

Hi Dan, I know you must love to see these emails ;) but hopefully it 
will contribute to a better voxbo.

We have been looking at the trial averages data in VBview. Here are some 
initial bugs we have encountered:
(1) We found that, once plotted, the fitted response for any covariate 
(or the overall fits) do not update when you change the voxel to be 
plotted. This initially gave me quite a scare.
(2) I would like to be able to plot the fits on the same graph as the 
trial-averaged data. I thought I'd be able to do this by ctrl-clicking 
the plots of the trial average and the fits. Doing this leads the fit to 
be plotted, but the trial average is plotted as a straight line
(3) I could not find how to change the scale (IRF-style vs. % change vs. 
% from zero, etc.)
(4) I mentioned this before, but here it is again: once a GLM has been 
loaded, the program is unable to load a new GLM. Also, it fails to 
acknowledge changes to averages.txt after the GLM has been loaded (but 
before the time series panel has been opened).

Other questions/comments:
(*) The plotting of time courses for a masked region is excruciatingly 
slow. I'm not sure why this is the case for fairly small masks.
(*) What is the use of the "interval" field in averages.txt? If your 
events are coded in TRs, it would seem that this field should be 
unnecessary.
(*) When coding the onset of events in terms of TRs, should we assume 
that the first event is "0" or "1"? (e.g., for an event occurring on the 
20th TR, would we code that as 19 or 20?) This should be added to the 
documentation of the averages.txt file.
(*) I'd like to see the "overlay" and "view GLM" options integrated if 
this is not a major pain.
(*) I'd like to see the return of the handy "find region" and "find all" 
features.

Finally a totally separate request:
vbi does not seem to be able to read the origin from .img files (nifti 
format) that are produced by SPM. I also don't believe that the correct 
origin is imported by vb2tes. We can certainly manually set the origin, 
but will Voxbo be able to read the origin in the future?

Thanks in advance, CR

-- 
Charan Ranganath, Ph.D.
Center for Neuroscience and Dept. of Psychology
University of California at Davis
1544 Newton Ct.
Davis, CA 95616

phone: 530-757-8750
fax: 530-757-8640

http://DynamicMemoryLab.org