Updating the QR decompozit​ion/factor​ization after a rank 1 modification

I WOULD LIKE TO PREFACE THIS BY APOLOGIZING FOR ASKING FOR HOMEWORK SOLUTIONS.

I have this really difficult college project to make and I am literally out of ideas.

Our professor gave each and everyone of us a different homework and mine sounds like this:

Please write the code for updating the QE decomposition of a matrix A sized m*n(where m>n) after a rank 1 modification (A becomes B=A+u*v' where u and v are m respectively n sized given vectors). I have attended all seminars and lectures and labs and the professor never talked about this process of updating the QR decomposition and I have no ideea how to do it.

Answer 1

[Steven Lord]

See the Algorithms section of the documentation page for the qrupdate function. Your library likely has the text referenced.

[First Last]

I did,it sends me to the exact documentation our prof gave us which is not that helpful.However I think I found some solutions on other sites but i have to tweak it a little bit,I'll come back and post it if i manage to get it to work properly.