How to create a cumulative frequency array

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BigWaffle
BigWaffle 2021-4-28
评论： BigWaffle 2021-4-30
I am trying to create an array to compute the cumulative frequency of array Z, which are less than or equal to the time in minutes specified by the minutes array, V.
X1= sqrt(rand(1,1000));
X2= normrnd(20,5, 1,1000);
w= rand(1,1000);
X3 = (-log(1- w));
sz = [1 1000];
X4 = unifrnd(4,15, sz);
Z=X1+X2+X3+X4; %(note: Z is an array with 1000 values in one row)
V = linspace(1, 1000, 1000); %array V

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采纳的回答

Jeff Miller
Jeff Miller 2021-4-28
This is inelegant, but it works:
cumFreq = zeros(size(V));
for i=1:numel(V)
cumFreq(i) = sum(Z<V(i));
end
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BigWaffle
BigWaffle 2021-4-30
so this is what i ended up with after many attempts
im trying to get frequency at each time step (V) for Z
V = linspace(1,1000,1000);
j = 1;
while sum(Y > V(j))>0
for j=j+1
freq(j) = sum(Z <= V(j));
end
end
BigWaffle
BigWaffle 2021-4-30
thanks to your guidance. it was working just needed a tweak

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