Redefining principal components

[SheinIdelsonMark]

Hi

I was wondering if you have a script for calculating the predefined PCs. You mentioned in the config file that these should be recomputed for new data sets. Is this just the weight matrix for a sample of representative spikes? Are the PCs computed on raw data or filtered data (which filter)?

Many many thanks,
Mark

[marius10p]

Hi Mark,

Yes, these are just the PCs of a sample of representative spikes (just their largest channels), aligned at sample 20. They are the temporal PCs, not the spatial masks. You can see it's just a .mat file that is loaded from disk.

I should really add the PC computation to the preprocessing: will do so at the next update. It really should not play much of a role in the sorting itself, but it might make the PC visualizations in Phy clearer.

Best,
Marius

[SheinIdelsonMark]

Hi Marius,

Thanks for the info. If this will not create major issues in Phy, I will
just wait for your next update.

Many thanks and all the best,
Mark

On Mon, Oct 24, 2016 at 11:03 PM, Marius Pachitariu <
notifications@github.com> wrote:

Hi Mark,

Yes, these are just the PCs of a sample of representative spikes (just
their largest channels), aligned at sample 20. They are the temporal PCs,
not the spatial masks. You can see it's just a .mat file that is loaded
from disk.

I should really add the PC computation to the preprocessing: will do so at
the next update. It really should not play much of a role in the sorting
itself, but it might make the PC visualizations in Phy clearer.

Best,
Marius

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Mark Shein-Idelson (PhD)
Max-Planck-Institute for Brain Research
Department of Neural Systems & Coding
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60438 Frankfurt am Main
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email: Mark.Shein-Idelson@brain.mpg.de
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