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I see. How can I delete this extra row in your opinion?

thanks again

Francesco Sammartino MD

On Aug 25, 2017 9:41 AM, "Saad Jbabdi" <[log in to unmask]> wrote:

> Hi - My guess is that the extra waypoint has made the matrix too sparse,
> so when matlab’s kmeans deletes the missing rows you end up with more
> clusters than data points?
>
> Cheers,
> Saad
>
>
> On 19 Aug 2017, at 22:54, Francesco Sammartino <[log in to unmask]>
> wrote:
>
> Hi
> I used probtrackx2 to perform tractography from the subthalamic nucleus to
> 6 cortical areas with the omatrix1 option and a waypoint through the
> thalamus (thalamus as a whole mask - wyapoint 'AND'). Result:* I am not
> able* to perform clustering with Kmeans anymore following the
> instructions reported at https://fsl.fmrib.ox.ac.uk/
> fsl/fslwiki/FDT/UserGuide
>
> I get this error:
> *Warning: Ignoring rows of X with missing data. *
> *> In kmeans (line 164) *
> *Error using kmeans (line 269)*
> *X must have more rows than the number of clusters.*
>
> The number of targetmasks is set to 6 so I have 6 clusters for Kmeans. The
> curious thing is that without waypoint it was working fine...
>
> thanks a lot
>
>
>