[FieldTrip] sourceplot - beamforming

Davide Rivolta drivolta81 at gmail.com
Mon Nov 7 12:37:19 CET 2011

Dear Fieldtrippers,

I have a question about ft_sourceplot (version 20111009).

I am following the tutorial on the reverse grid transformation (

I can get to the end of the script and try to plot the relative change in
power of the stimulus condition again the baseline (visual task).

I have attached the figures I get from one subject only.

First of all, it is upside-down. Is it correct? How to change this?

Here is the script I use:

    mri = ft_read_mri(mri_name);
    cfg            = [];
    cfg.downsample = 1;
    sourceDiff.dim           = [17 20 17];
    sourceDiff_Int  = ft_sourceinterpolate(cfg, sourceDiff , mri);

    cfg               = [];
    cfg.method        = 'ortho';
    cfg.funparameter  = 'avg.pow';
    cfg.maskparameter = cfg.funparameter;
    cfg.units         = 'mm';
    cfg.opacitylim = [0.2 1.3];

This is the structure of sourceDiff_Int:

sourceDiff_Int =

       inside: [256x256x256 logical]
          avg: [1x1 struct]
          dim: [256 256 256]
    transform: [4x4 double]
      anatomy: [256x256x256 int16]
     coordsys: 'ctf'
         unit: 'mm'
          cfg: [1x1 struct]

Thanks for the help,

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