count number values exceeds given threshold in moving window

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Jay Hanuman
Jay Hanuman 2016-10-27
评论： Walter Roberson 2016-10-27
I have time vs values plot. time =100. I want to select time 1 to 4 & then count how many values are exceeding 20. i.e. for time 1 to 4 values are 16 43 94 21 so 3 values are exceeding 20 so count should be 3. then want move window so time is 2 to 5 & count number of values exceeding 20. so last window would be 97 to 100. how to do it.

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回答（1 个）

Fangjun Jiang
Fangjun Jiang 2016-10-27
M=100;
N=4;
A=randi(35,1,M);
B=A>20;
C=ones(N,M-N);
C(1,:)=1:(M-N);
C=cumsum(C);
D=sum(B(C));

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