[Eeglablist] Question about LMS Filtering in fMRIb2.1 (File fastranc.m)

[Michael Jachan]

Dear all!

I try to understand the LMS algorithm in the fMRIb2.1-Addon for adaptive noise cancellation. It is provided in the file fastranc.m.

In Line 66, the r-vector is initialized by flipud([0;refs(1:N)])

Question: Why is there a flipud() used? IMHO, it shall not be flipped up-down.

Thank you,

Michael


Dr. Michael Jachan
Brain Products GmbH

https://urldefense.com/v3/__http://www.brainproducts.com__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKK2HF-wD$ <https://urldefense.com/v3/__http://www.brainproducts.com/__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKPxMq0hS$ >

Zeppelinstrasse 7
82205 Gilching
Germany

General Managers: Pierluigi Castellone, Dr. Manfred Jaschke
HRB München 118521, VAT ID: DE812343586, WEEE-REG.: DE89975135


Dr. Michael Jachan
Software Developer

Brain Products GmbH
R&D | Software Development
Zeppelinstrasse 7 | 82205 Gilching | Germany
Phone: +49 8105 73384 624 | Fax (Ext.): - 505
https://urldefense.com/v3/__http://www.brainproducts.com__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKK2HF-wD$ <https://urldefense.com/v3/__https://www.brainproducts.com__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKCMyRNbQ$ >

General Managers: Pierluigi Castellone, Dr. Manfred Jaschke
HRB München 118521, VAT ID: DE812343586, WEEE-REG.: DE89975135

Read our Privacy Policy for information about data protection: https://urldefense.com/v3/__http://www.brainproducts.com/privacy-policy/__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKG121hDG$ <https://urldefense.com/v3/__https://brainproducts.com/privacy-policy/__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKAad9qzk$ >


[cid:c2-tw_1ec4d1fb-08ac-4b16-8400-b8fbcdf8e950.png]<https://urldefense.com/v3/__https://www.twitter.com/brain_products__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKPVnsh3c$ > [cid:c2-li_6bfc5524-2981-4cf9-b250-eb8ad27ec3cd.png] <https://urldefense.com/v3/__https://www.linkedin.com/company/brain-products-gmbh__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKHwB8EqE$ >  [cid:c2-fb_8115df07-1d9d-4d57-bf68-4a7131308e78.png] <https://urldefense.com/v3/__https://www.facebook.com/brainproducts__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKE6xX7c5$ >  [cid:c2-yt_968f854a-c1a3-4507-95fe-255db0e2f39c.png] <https://urldefense.com/v3/__https://www.youtube.com/c/BrainProductsGmbH__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKBxIYRKi$ >  [cid:c2-gh_e31cd098-6a6e-4052-9878-5dad9ab9f970.png] <https://urldefense.com/v3/__https://github.com/brain-products__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKBLTcONp$ >
[https://urldefense.com/v3/__https://images.brainproducts.com/events.jpg__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKNWHCqJt$ ]<https://urldefense.com/v3/__https://www.brainproducts.com/events/__;!!Mih3wA!AyTSaARRzfZReZW-ok8rjixCTMqKMsMK5FlqWT4A3Ya_Yqee-ER9SYdNWKvhIdPc-en_0RFdi3I4px9IoI5QMcybERXtKOKg9vOm$ >
.