[Eeglablist] topoplotting the grid_or_val output

[Ramón Martinez]

Dear Lars,
A few comments below.

> I used the topoplot function to produce an output: grid_or_val​; which is
> a 2D grid of interpolated channel values.
>
> ​I used this output to apply cluster based correction for multiple
> comparisons (for frequency x electrode space).
>
Using the 64x64 matrix (output from topoplot) to make stats on it should be
done under very specific and limited  cisrcunstances. As you mentioned, the
topogaphy given by topoplot is the result of an interpolation made on the
original values provided as inputs. In most cases, this will raise concerns
since you are doing stats on artificially created values. You might want to
avoid making stats on the interpolated values and try to make them on the
original values (before the interpolation). Solved this, you will not need
topoplot to accept a 64x64 matrix as input.


>
> As a result I have a 3D matrix (gridX x gridY x freq) which I would like
> to plot again in a topoplot.
>
> The problem is that the topoplot function only accepts electrode-data and
> not this interpolated grid.
>


However, if still want to do this.  You can plot any topoplot figure, get
the handles and replace the field associated with the data plotted. This
way you can keep the topoplot features. This is just one way... there may
be more, and maybe easier. But given the reply to the first part of your
email, you might not need to do this trick.

Hope this helps,
Ramon

>
> Is it possible to create a head-plot with my thresholded T-value maps (the
> grid)?
>
>
> Best,
> Lars Benschop​
>
>
>
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-- 
_____________________________________________________
Ramon Martinez-Cancino
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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