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how to vectorize this loop

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nc
nc 2016-10-26
评论： Rena Berman 2017-1-20
for i=1:length(v) %for each numer from 1 to length of arry
if(i==1) %1/1 = 1
cumavg(i)=v(i);
else
cumavg(i)=0;
for j=1:i
cumavg(i)=cumavg(i)+v(j);
end
cumavg(i)=cumavg(i)/i;
end
if(cumavg(i)<= (avg-0.01))
mark=i;
end
end
  2 个评论
Matt J
Matt J 2016-10-26
编辑：Matt J 2016-10-26
nc asked (and then deleted):
How to vectorize this loop
for i=1:length(v) %for each numer from 1 to length of arry
if(i==1) %1/1 = 1
cumavg(i)=v(i);
else
cumavg(i)=0;
for j=1:i
cumavg(i)=cumavg(i)+v(j);
end
cumavg(i)=cumavg(i)/i;
end
if(cumavg(i)<= (avg-0.01))
mark=i;
end
end
Rena Berman
Rena Berman 2017-1-20
(Answers Dev) Restored Question.

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采纳的回答

James Tursa
James Tursa 2016-10-26
编辑：James Tursa 2016-10-26
cumavg = cumsum(v)./(1:numel(v));
mark = find(cumavg<=(avg-0.01),1,'last');

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