Is there a way to write these sentences without for loop?

Hi I am trying to vectorize for loop in this question to make my code run faster. Here is the for loop. Is there a way I can write B_new without the for loop?

tof_pix1 = flatten_tof(pix:pix+127)';
 for j=1:128
     B_new(1:numsamps-tof_pix1(j)+1,j)=nr(tof_pix1(j):end,j);
 end

[Niklas Nylén]

As long as B_new is pre-allocated I doubt that you would see any major performance improvement by vectorizing this code. In modern Matlab versions it is no longer an absolute truth that matrix operations are faster than loops. There are many examples where it's actually the other way around.

Did you run your code with the profile tool to check which lines that are actually taking the most time? https://se.mathworks.com/help/matlab/ref/profile.html

[Adam Danz]

^^ my thoughts exactly.

[Aparna Singh]

okay that is a great suggestion. i will look into it!