If SO, how can I get the value of M?
In fact, I think by "summing the seed_to_target values across voxels in the seed roi (or sub-roi)" we get M, not N.
ps:the ratio M/N as probability
There maybe something I misunderstand.
2011-08-09
Xiangzhen Kong
发件人： Saad Jbabdi
发送时间： 2011-08-09 21:21:37
收件人： FSL
抄送：
主题： Re: [FSL] Structural Connectivity Matrix
Same answer - I thought M was N :)
On 9 Aug 2011, at 14:19, Xiangzhen Kong wrote:
Sorry I have made a mistake in the 2nd question.
The right version is (modified in RED):
"
2. To get the probabilities by 'the easiest way' you suggested, I need the ratio M/N as the probability. Now I can get the files named seeds_to_<target>. From seeds_to_<target> I can get the number of samples(M) seeded from that voxel(within specific mask) reaching the target mask.
So, how can I get the N, the total samples out of specific mask in the seed mask?
As far as I know, I can get N by summing the values of each voxel in the masked(masked by specific ROI) seed mask or just multiplying the number of voxels in specific mask by nsamples(default=5000).
"
--
Saad Jbabdi
University of Oxford, FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
(+44)1865-222466 (fax 717)
