How to replace values in a very large array
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I have an array idx_Laser which is very large (~1 billion values). Whenever a certain condition is fulfilled for another array tdcRelTime I want to replace the values in my idx_Laser array.
The trivial solution would probably be:
for xx = 1:length(tdcRelTime)
if tdcRelTime(xx) < 1.5e10
idx_Laser(idx_Laser==xx) = 0;
However, as both arrays are quite big, this takes extremely long.
Is there a solution for that problem that is computionally more efficient?
I thought about iterating only through a part of the idx_Laser array, as this is sorted by the size of the values, but I couldnt come up with a good solution.