CAR filtering and median trace.

[lauritk]

Hi,

in this recommedation there is a line:

"Note that Phase3A probes produce data that is offset from zero (even in the high-pass filtered AP band), so subtracting the median across time of each channel from itself should be done first."

Does it mean that it is better to subtract the median across time of each channel from itself before the CAR, or does it matter? In the function 'applyCARtoDat.m' it is applied afterwards, I think?

[nsteinme]

I believe it does matter and I believe the function here subtracts median across time first...

…

On Mon, Jun 18, 2018 at 7:22 AM Lauri Kantola ***@***.***> wrote: Hi, in this <https://github.com/cortex-lab/neuropixels/wiki/Recommended_preprocessing> recommedation there is a line: "Note that Phase3A probes produce data that is offset from zero (even in the high-pass filtered AP band), so subtracting the median across time of each channel from itself should be done first." Does it mean that it is better to subtract the median across time of each channel from itself before the CAR, or does it matter? In the function 'applyCARtoDat.m' it is applied afterwards, I think? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#7>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AHPUP_ATRWuYIH4NF7py2ocdJJOCezSlks5t90cMgaJpZM4UrNXu> .

[lauritk]

Sorry, you're correct. My bad, I somehow misunderstood the comments. Thanks!