how to have a vector that counts how many repetitive numbers there is in another vector?
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Pedro Vicente
on 17 Aug 2018
Answered: Andrei Bobrov
on 17 Aug 2018
So i have a vector with 100 numbers. And those numbers only goes until 51.
For example A = [ 50 49 32 21 50 38 41 2 46.....]
And what i want is a vector B that has 51 numbers and tells me for example how many 1's there is in vector A, and how many 2's there's in the vector and so on.
Thank you
Accepted Answer
madhan ravi
on 17 Aug 2018
Maybe try this example:
A = [1 2 3 3 4 5 1]
u = unique(A)
Expected_result = histc(A,u)
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More Answers (2)
Image Analyst
on 17 Aug 2018
Do you mean the histogram?
% Make a vector with 1000 numbers in the range 1 - 51.
A = randi(51, 1, 1000)
% count frequency of each number
histObj = histogram(A)
grid on;
title('Histogram of A', 'FontSize', 17);
xlabel('A Value', 'FontSize', 17);
ylabel('Count', 'FontSize', 17);
% Get counts.
counts = histObj.Values
% Get bin edges.
edges = histObj.BinEdges
% Get bin centers.
binCenters = (edges(1:end-1) + edges(2:end)) / 2
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/193884/image.png)
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