Christian,
This is going back a few weeks ago. I am attempting to identify the independent components in a group of images. This is the error I get after using avwmerge:
Starting PCA ...
An exception has been thrown
Runtime error:- detected by Newmat: process fails to converge
MatrixType = Diag # Rows = 2; # Cols = 2; lower BW = 0; upper BW = 0
Trace: Evalue(tql2).
Does this imply that the independent components cannot be identified?
Regards,
DJ
Christian Beckmann <[log in to unmask]> wrote:
> DJ
>
> time series analysis requires time series - all our functional tools work
> on 4D files. It seems that you've been trying to run it on a single 3D
> volume:
>
> >Melodic Version 2.0
> >
> >Melodic results will be in /home/norm_volumes_1/nepi_vol_0002.ica
> >
> >Reading data file filtered_func_data ... done
> >Create mask ... done
> >Excluding voxels with constant value
> >Data size : 1 x 510340
>
> You will need to create a 4d file first (avwmerge -t does this). If the
> file should have been 4D already, check the header information (avwhd) to
> see why it appears as a 3d volume
>
> ta
> c
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