Find the length of a vector up to a certain value

조회 수: 4(최근 30일)
Hi!
I have a vector (SortN1250) which is 75558x1 with a range from 1:1000 and i want to extract the length of the vector at certain values (100:100:5000) and ad them to another vector. This is my code:
ProbdistPoredens(50,1)=zeros
for n=100:100:5000
ind = find(abs(SortB1250(:,1)<n));
lengthind=length(ind)
for i=1:50
ProbdistPoredens(i,1)=lengthind
end
end
ProbdistPoredens is however just filled with the number 75558 on all 50 rows. This number is only expeted to show at the very last row in the column.
Any suggestions would be greatly appriciated!
Regards,
  댓글 수: 2
Holmbrero
Holmbrero 2022년 6월 7일
But ind should change with n, right?

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채택된 답변

Image Analyst
Image Analyst 2022년 6월 7일
Explain in words what this means: (100:100:5000)
Do you want only elements that have values of 100, 200, 300, 400, ..., 4900, or 5000?
Is that what "at certain values" means? Or does it mean at certain indexes?
  댓글 수: 3
Holmbrero
Holmbrero 2022년 6월 8일
Works great, thank you!

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추가 답변(1개)

Simon Chan
Simon Chan 2022년 6월 8일
The inner for loop is not necessary and it overwrite itself for every 'n'.
You may modify the code as follows.
ProbdistPoredens(50,1)=zeros;
for n=100:100:5000
ind = find(abs(SortB1250(:,1)<n));
lengthind=length(ind);
ProbdistPoredens(n/100,1)=lengthind; % modify the index from i to n/100
end
Alternatively, you can use function histcounts to do the same thing.
[ProbdistPoredens,~] = histcounts(SortB1250,0:100:5000,'Normalization','cumcount') % Use function hiscounts

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