Is this for-loop vectorizable?

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埃博拉酱
埃博拉酱 2019-9-24
回答： Bruno Luong 2019-9-24
b=1;
for a=2:length(ToneLines)
if ToneLines(a)-ToneLines(b)>13000
b=a;
else
ToneLines(a)=0;
end
end
ToneLines=ToneLines(ToneLines>0);
ToneLines is a vector of positive integers sorted from small to large without any equal elements. Is it possible to vectorize this loop for a better performance?

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回答（1 个）

Bruno Luong
Bruno Luong 2019-9-24
I don't think sequential search can be vectorizable.
You might improve a bit of the search by implementing dichotomy seach rather than linear.

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